(1 (1 1 1 (1 1 2 (14 1 3 (25 1 4 (36 (47 (54 2 1 (54 2 2 (64 2 3 (77 2 4 (90 2 5 (100 (111 (120 3 1 (120 3 2 (131 3 3 (141 3 4 (149 3 5 (162 3 6 (177 (189 (196 4 1 (196 4 2 (210 4 3 (221 4 4 (235 4 5 (243
犆犗犖犜犈犖犜犛 4 6 (251 (268 (278 5 1 (278 5 2 (289 5 3 (300 5 4 (312 (324 (334 (344
[ ],,, ;,,, 11 :(1 (2, (3, (4, : 1
知识点精析 1,,, α, 1 1 1,,, ;, 1 1 1 2 (,,,,,, A 400 (1, : 烄烄 ( { 烅烅 ( { 烆 烆 ( (2 1 1 2 1 1 2 2
3 (1 :10-9 -10-8 m;(2 :10-10 -10-9 m; (3 :10-15 -10-14 m;(4 :10-18 -10-17 m; (5 :<10-19 m 4 (1 (2, :, : (3 5 (1 : :, :, (2 :, 1687,,, (3 : 1957 10, ; 1961 4 12, ; 1967 7 20,,, 6,, (1, (2, (3, 3
,, (4,,, 问题探究, : :, : :, 1 1 3 1 1 3 : : 解题方法指导 1 1 -, +,, 1 1 4 ( 1 1 4,, 4
, B 2, ( A,, B,, C,, D,, :,, A,B C D A ( 2 3 (2005 1 1 5,, ( A, B, C D, 1 1 5,,, C,, 3 4, ( A B C D 5
6,,,A B,C D CD, 4 5 (2004, :,,,,,,,,, 基础达标演练 1, 2,,,, 3, 20,,,, 4,,,, 5,,,,, 6(2005 : ; ;
7, : 8,,, 9 (2006,,, 1 1 6 ( 1 1 6 10(2005 ( A, B, C, D, 11(2005 :, ( A B C D 12,, ( A, B, C D 13(2005,,,, 7
答案与提示 1 ; ; 2 ; 3 ; ; 4 ; ; 5 ; 6 ( ; 7 8 ; ; 9D( : B, 10D( : ;, ;, 11A( :, A 12AC( :,,,,,,, (,, AC, BD 13, ( ( :,, 难点指津,,,, 7 (1 (2 8
: 1,,, 2,,, 3,,, 4,, 5, (3, :,, ( ;, 8 :(1, ;(2, : ;(3 ;(4, ;(5,, :, ;,,,, 9 ;,, ( 26 ;, ;, 32 9
综合延伸 5 6 (2004 19,, ( A B C D,, D,,, 6 7 (2005 1 1 7,, ( 1 1 7 10
A,B,D C, C, 7 8 1 1 8,,,,, 1 1 8,,,,,,,,, 9 (2005 :, A B ( C D, 20 20, A, 11
思维拓展测试 1 ( A B C D 2(2005 ( A C B D 3(2005, ( A B C D 4(2005, ( A B C ( D 5(2005 A B ( C D 6(2005, :, ( A C B D 7 1 1 9,, 1 1 9 8(2005,, 9(2005 ; 12
10(2005 1897, ;20 (, 11, 1 1 10(a (b (V/cm 3 50 (V/cm 3 50 (V/cm 3 94 答案与提示 1 1 10 1B( :,, : 2D( : 3D( : 4D( :, 5A( :A,,B C D, 6B( : 7 ; ; 8 ; 9 ; ; 10 ; 11 ( : :, 13
视野情境扫描,,, 17,,,,, 1990,,,,,, 1 2 :(1 (2,, (3 :(1 (2 知识点精析 1 (1 :,,, 14
(2, :, ;, ;,,, (3 :, (kg, : (g (mg, (t : 1t=1000kg 1kg=1000g 1g=1000mg 1dm 3 1kg, 40~70kg, 1t,3 1g 2 ( :, (1 1, 2, (, ;, 3, 4,,, 5, 6, (2 1,,,,, 2,,,,, :,,,,,,, 15
3,, 500g, 05g, 05g 500g,,, (3,,,, m0, M, m=m-m0,,,, 问题探究 :,,, : : : :, :,,,,,,, : 解题方法指导 1 1, ( A B C D 16
, B C,,, A, D, B C D,, BCD 2 60 ; 15 10 3 ; 02 8 05kg, 500g, 60g,15 10 3 g=15kg, 15 10 3 g, 02kg g;g;kg,,,, 60g, 50kg,3 1g, 2 3, 1 2 1, 1 2 1 20g, 5g, 30g; 1g, 02g, 4 3, 46g; 20g+5g+5g+46g=346g 346g,, 17
,,, ( 基础达标演练 1,,,, :, (, 2, 3 : 045t= kg= g 200mg= g= kg 4 : (1, ; (2, ; (3 5 (2006 1 2 2 1 2 2, g 6 50 ( At Bkg Cg Dmg 7, ( A B C D 8, ( A B 18
C D 9, ( A B C D 10 60kg ( A360kg B10kg C60kg D 11,, A B C D ( 12, 1 2 3, ;, 13,, m1, 1 2 3,, m2, m2, 14, : m1 > 1, ; 2 ; 3 ; 4, ; 5, ; 6,, ( ( ( 19
答案与提示 1 ;kg;g;mg;t; ; ; ; 2 ; ; ; ; 345 10 2 ;45 10 5 ;02;2 10-4 4(1 (2 (3 5564 6B( :, 7C( :BCD, 8D ( :, 9B( : 10C( : 11B( : 12 ; 13, 142 :, ;3 ; 4, 难点指津,,,,, 3 (1 ; (2, ; (3, 4 (1,,,,, 20
,,,, m =m -m (2,,,, (3,,,,,,,,,, (4, 综合延伸 3 4 (2004, ( A, B, 0 C, D, :A B C, D,, D D 21
5 (2005, 1 2 4 g 1 2 4 65g, 02g, 18g, 659g+18g=668g ;668,,,, 4 6 (2005 1 2 5, : (1 ; (2 ; (3 1 2 5,, (1 ;(2 ;(3, 5 7, 03g,, : 50g, 20g 2g, 04g,, 01g,, 22
:,,, m =m +m -m0=92g+04g-03g=921g; m = m +m -m0=92g+01g-03g=718g,, 思维拓展测试 1(2005 300g, ( A B C D 2(2005,,, A B C ( D 3(2005 ( A05g B5g C50g D500g 4,, ( A B C D 5 7,,,, ( A4 B3 C2 D1 6(2005,, ( 7(2005,, 50g 20g 10g 1, 1 2 6 1 2 6, g,, ( 8 23
,, 354g, g ( 1g 9 : 答案与提示 1B( : 2D( : 3B( : 4A( :,, 5C( : 3 3 1, 1 1 1 6 ( : 7814; ( : 02g 8 :m =m +m, m =m -m =35g- 04g=346g 9(1, a;(2 m;(3, M;(4 S= M m a2 视野情境扫描 ( 0-10 50 kg,,,,, 6 10-35 kg, 91 10-31 kg, 166 10-27 kg 10-27 ~10-25 kg, 10-20 kg, 10 0 ~10 2 kg,, 10 5 kg, 598 10 24 kg, 20 10 30 kg,, 10 32 kg,, 10 33 kg,,, 10 50 kg, 24
1 3 :(1, (2 (3, :,,, 知识点精析 1 (1 :,, :,,, 89g/cm 3, 1cm 3 89g,, (2 :,,, :, 2 7g/cm 3 ;, 7 9g/cm 3 ;, 1g/cm 3 :, 2 (1 :,,, 25
,, ρ, m, V,, ρ= m V, (2 cm 3, g, g/cm 3 ; m 3, kg, kg/m 3 : 1g/cm 3 =10 3 kg/m 3 (3,,,,, (4, 1 10 3 kg/m 3 1g/cm 3 问题探究 : :,, V, m,, :, 1 3 1, m/g V/cm 3 1 27 10 2 54 20 3 81 30 4 108 40 - - - 1 3 1 : 1,, 2 26
解题方法指导 1 1,, (,,,, ρ = m V, :,, ;,, ;,,,,,, ( 2 2 (2005 35m 2m 06m, 4t : (1 (, 24 10 3 kg/m 3 (2,,,, (1m=ρV=24 10 3 35 2 06kg=1008t; m (2V = ρ = 4 103 kg =167m 3 2 4 10 3 kg/m 3, ρ = m : V m V,,,, 27
基础达标演练 1,, m, V, 2, 3 :(102m 3 = dm 3 = cm 3 ;(24500mL= L= dm 3 ;(378 10 3 kg/m 3 = g/cm 3 4 40g, 50cm 3, kg/m 3,, kg/m 3 5, 5L, 092 10 3 kg/m 3, kg( 1L=1 10-3 m 3 6,, ( A B C D 7, ( A B C D 8 ρ= m V, ( A B, C D, 9 35kg, ( A35g 28 B35g C35 10-1 g D35 10-2 g 10, 6kg, 06 10 3 kg/m 3, 113 10 3 kg/m 3, 11,
, 6L 5L, 9L :(11000kg (2 kg ( 10, 30 12 m, ρ, m /3, ( Aρ Bρ / 3 C2ρ / 3 D3ρ 13,,, 答案与提示 1 ; ; ρ = m V ; kg;m 3 ;kg/m 3 210 10 3 kg/m 3 ;1m 3 1000kg 32 10 2 ;2 10 5 ;45;45;78 408 10 3 ;08 10 3 546 6B( : 7C( : 8D( :, 9D( : 10 :V =V,V =m / ρ =001m 3,m =ρ V =113kg 11 :m1=ρ V1=10 103 kg/m 3 5 10-3 m 3 =5kg, n= M m1 = 1000kg 5kg =200, : m2=ρ V2=10 103 kg/m 3 9 10-3 m 3 = 9kg, :m3=30 10 (m2-m1=1200kg 12 C 13 :(1 (2 (3 :V = m ρ = 979g =110cm 3,V>V,,V =V-V = 8 9g/m 3 10cm 3 29
难点指津,, 3, ρ= m V, :, m V ρ = 4 ρ= m V,, m= ρv :,,,,,,,,, m=ρv, :,,,, 5 ρ= m V V= m ρ V= m ρ,,, 30
综合延伸 3 3 (2005 275 (, 025 (, kg/m 3 ρ= m V g;l(dm 3 ;11 10 3 4 10g,, 20g, 185g,,,, m =20g-10g=10g, V =m / ρ =10g/1 (g/cm 3 =10cm 3, V =10cm 3, m =185g-10g=85g, ρ =m /V =85g/10cm 3 =085g/cm 3 =085 10 3 kg/m 3 4 5, 11g/cm 3 05L, 06kg,,, = 31 ρ= m0 V0 12 10 3 kg/m 3,, 12 10 3 kg/m 3 >11g/cm 3, :,, ρ = m0 =12 10 3 kg/m 3 >11g/cm 3, V0 m, : (m+0 6kg 0 5 10-3 (m 3 +m/1 0 10 3 (kg/m 3 =11 103 kg/m 3,
:m=05kg 32 5 6, 120cm 3, 979g, : (1 (2 (3, (1 ρ = m = 979g =82g/cm 3 V 120cm <ρ, 3 (2 V =V -V =120cm 3-979g =10cm 3 8 9g/cm 3 (3, m =m +m =979g+1g/cm 3 10cm 3 =989g : ;,, ;,, 思维拓展测试 1(2005 ( 1 29kg/m 3 ( A B C D 2(2005, ( A, B, C D 3 1kg,, ( ( A 1kg C 1kg B 1kg D
4 3 2, 1 3, ( A1 2 B2 1 C2 9 D9 2 5, 33 ( A B C D 6(2005,, 104 kg, ( ρ =79 10 3 kg/m 3, ρ = 27 10 3 kg/m 3 ( A45kg B54kg C104kg D158kg 750mL 50mL, ( A 08 10 3 kg/m 3 B 08 10 3 kg/m 3 C 08 10 3 kg/m 3 D 8(2005 220mL(227g, kg/m 3 9,,, 10, ( 09 10 3 kg/m 3 11, 01kg,, 04kg, 08kg,, 09kg : (1 ; (2 ; (3 12(2005, : (cm 3 58 79 165 350 400 M +m (g 107 128 214 399 m (1 kg/m 3 ; (2 m= g 13,, (
(cm 3 (g / (g/cm 3 1 10 18 1 8 2 20 36 1 8 3 30 54 1 8 4 10 8 0 0 80 5 20 16 0 80 6 30 24 0 80 (1 1 2(2 3 1 3 4 5(5 6 4 6, : (2,, (3, : 答案与提示 1C( : m=ρv 2D( :,, 3C( :,, 4D( :,(3/1 (2/3=9 2 5B( :,,, 6B( : ρ V-ρ V=104kg V, 7A( :, 8103 10 3 ( : ρ= m V 9 ; ; 109 10( :, 11(1m =m1 -m =04kg-01kg=03kg, V =V = m = ρ 03 10-3 m 3 ;(2m =m2-m =08kg-01kg=07kg;(3 34
V =V = m +m2-m3 ρ 10-3 m 3, ρ = m =35 10 3 kg/m 3 V = 0 3kg+0 8kg-0 9kg 1 0 10 3 kg/m 3 =02 12(1 ΔV=292cm 3,Δm=292g, ρ = Δm ΔV =1g /cm 3 =10 10 3 kg/m 3 ;(2 ΔV =342cm 3,Δm =ρ ΔV = 342g,m=107g+342g=449g 13(1, ;(21 4,2 5,3 6;(3, ;, 视野情境扫描, : 10 11 kg/cm 3, /,,,,,,,,,,, :,, :,,,,,, 35
1 4 :(1, (2 (, :, 知识点精析 1 (1,,, (2 (ml,1ml=1cm 3, 1m 3,1L= 10 3 ml 2 (1 (2, (3, (4 :1, V02, V13 V=V1-V0 (5,,, ;, : ( ( 3 (1 :1 (m=m -m ; 36
2 ( V;3 ρ = m V ρ (2 :1 m;2 (V=V -V0;3 ρ = m V ρ (3 :1 m;2, V;3 ρ = m V ρ 问题探究,,, 1 4 1, : : : : 1 4 1 : 解题方法指导 1 1 (2005 (1, (, (,, (2, 20g 5g, 1 4 2 1 4 2,, g (3 48 ml, 1 4 2, m 3, kg/m 3 37
, m= (20+5+14g=264g,V =V2 -V1 =60cm 3-48cm 3 =12cm 3, ρ= m V =22 103 kg/m 3 (1 (2264 (312 ;22 10 3 kg/m 3 2 2, m1(g m2(g ρ ( g/cm 3 ρ= m,, V ( m=m1-m2(g; V(cm 3, 基础达标演练 1,, 2,, 3 1 4 3, ml;, ml, cm 3, m 3 4, 10cm 3,,, 150mL 190mL, 12g, 5 ( 1 4 3 A B 38
C D 6, : A,, V1 B, V2 C,, V3 D m1 E m2 (1, : (2 : =, =, = ( 7(2005, 1 4 4, g, cm 3, kg/m 3 1 4 4 8, :, m0 V0 1 4 5 : (1, ( (2, 1 4 5 (3 9 (,, ( : 39
: 10(2005, :,,, :, 答案与提示 1 ; ; ρ = m V 2 ; 32ml;36;56;20;20 10-5 404 10 3 kg/m 3 5A( : 6(1DAC;m1;V3-V1; m1 727;10;27 10 3 V3-V1 8(1 (21 m0;2, m1;3,, m2;4 ρ= m0 =ρ m0+m1-m2 9 : ( ; : 10,,,, 难点指津 4, :,, (,,,,,,, 40
,,,,,,, 5 (1, : : m, m,, m, m=ρv,m V, :m1/m2=ρ / 1 ρ 2, : ρ 2= (m / -m ρ 1/(m-m ( ρ 1, ρ 2 (2, ; ;, ρ= m V (3 (, 综合延伸 3 3 (2005,, 14g 2cm 3, g/cm 3, 89 10 3 kg/m 3, (,, ρ=14g/2cm 3 =7g/cm 3 7; 41
4 (2005 1 4 6,, 1 4 6, 4,, 4 5 (2005 (1, 1 4 7, g 1 4 7 (2,,, 1 4 8, cm 3 (3 kg/m 3, A B ( 42
1 4 8 (4, :,,, (11756 (270 (3251 10 3 ; (4 ; 6,,,, : 1 m; 2 m ; 43 V 3,, m ; 4 :V=V = m -m, ρ ρ= m V = m, m -m ρ ρ= m m -m ρ : ρ= m V,,
思维拓展测试 1(2005,,, 1 4 9, 1 4 10, 1 4 9 1 4 10 m/g m1/g m2/g V/cm 3 ρ / g cm -3 150 2 (2006, 1 m1 2 2 3 3 m2 m2 4 m=m1-m2 4 m=m2-m1 5 V 6 1 m1 5 6 V 7 44
3(2005, m(g V(cm 3 m/v(g/cm 3 1 1 79 10 7 9 2 2 158 20 7 9 3 1 5 10 ( 4 2 158 316 0 5 (1 ; (2 2 4, : ; (3 1 3, : ; (4 1 2, :, ; (5 :, 4(2005 AD, :, : : 5(2005 : A, V0; B ; C, V1; D m (1 (2 :V= ; (3 : ρ 6(2005, ( 1, ; 2 ; 3,, ; 4,, ; 45
5, 1 4 11, : 答案与提示 1117;33;30;11( : 1 4 11 2, 3 ; ; ; 4 :( :, (, :( : m1, m2, (m2-m1/ ρ 5(1DCAB (2V2-V1 (3 ρ = m (V2-V1 64; 视野情境扫描 : ρ=m/v,, 05mL, 1mL,, : : m0; m1;,, m2; F =(m2-m1g=gρ, V =(m2-m1/ V ρ, ρ /V, =m0 ρ =m0 ρ /(m2-m1, 002g, 002mL, 46
(1~12,13~15 3, 45 1 ( A60g,08mm B60g,80μm C6g,08μm D6g,80μm 2 ( A, B C, D, 3, ( A, B, C, D, 4, ( A, B 300 C D 5 89 10 3 kg/m 3, ( A1m 3 89 10 3 kg/m 3 B1m 3 89 10 3 kg C1m 3 89 10 3 kg/m 3 D 1kg 89 10 3 m 3 6 1 10 14 t/m 3, 335cm 3 ( ( A335 10 12 kg C335 10 6 kg B335 10 9 kg D335 10 3 kg 47
7 1 1 A B C m V,,A B C ρ A ρ B ρ C ρ ( Aρ A > ρ B > ρ C ρ A >ρ Bρ A > ρ B > ρ C ρ C>ρ Cρ A < ρ B < ρ C ρ A >ρ Dρ A < ρ B < ρ C ρ C>ρ 1 1 8, A B ( C D 9 1/2, (, ( A1/16 B1/8 C1/4 D1/2 10 ( A B C D 11, :( :1cm, 3g ( :2cm,24g ( :3cm,64g ( :4cm,192g, ( A B C D 12, ( A, B C D, 13, ( A,, B, C,, D, 48
14 1 2, ( A B 08 10 3 kg/m 3 C50g 40g/cm 3 D 40g, 1 2 50cm 3 15,, ( A, B, C, D, ( 1, 21 16 1 3, -, + 17 14nm,5, m, mm 1 3 1 4 18, ( 1 4,, (,, 19 49 (,
20 10g -5 0, 10g, 10g(, ( 21 1/3,,, 22 1 5,,,,, ( ρ =08g/cm 3, ρ =18g/cm 3 23(2002 89 10 3 kg/m 3, 10cm 5cm 1 5 2cm kg 004kg,, 4, kg (13 24,, 1 6 g,, 1 6, cm 3, kg/m 3 1 6 25 (2006 ( 10g,, :250cm 3 100cm 3 50cm 3, 5N, 02 N, 1g, 20mg (, 1 7, 50
,, :(1 ;(2 ;(3 (21 1 7 26 (, 10L, 1018kg, ( ρ = 25 10 3 kg/m 3 27 1 8, 3 10-4 m 3 02kg, 001kg, 25, : (1 ; (2 28, m 1 9 AB, : (1 (2 答案与提示 1 8 V 1B( : 1 9 2D( : 3B( :,, 51
52 4A( :, 5B( : 6A( :1 10 14 t/m 3 335 10-6 m 3 =335 10 8 t=335 10 12 kg 7A( :,, ρ A>ρ B= ρ > ρ C 8B( :, 9A( : 2, 8 10A( : 11C( :, 12D( :,, 13ACD( :, ACD 14ABD( :, 08, 08 10 3 kg/m 3 15AD( :, 16 ; 1714 10-9 ;28 10-9 18 ; ; 19 ; ; 20 ; ; 211 1;05 22 ; ; 23089;016 24840;30;28 10 3 25 : 50cm 3 : (1 m; (2, V1; (3, V2 : ρ = m V2-V1 26 :, (1m=m +m ;(2V = V +V = m + m, (1(2 :m =03kg, η= m ρ ρ V =30kg /m 3
27(1V = m =2 10-4 m 3,V =V -V =1 10-4 m 3,(2m =25 ρ 001kg=025kg, ρ = m =25 10 3 kg/m 3 V 28(1 :V =0,m =0, m =40g;(2 V =20cm 3, m =m -m =20g, ρ = m =1g/cm 3 V 53
[ ] 学习指导,,,,,,,, 21 :(1 (2, (3 :(1 (2, 54
1 ; ; 2 (1 :,,,, (2 : ;,,,, 3,, :,,, : (1 ; (2, ; (3 :, ;,, : ( ; ( ; ( 4 (1 :, (2,, 55
(3,, 2 1 1,,, (, 2 1 1 (4 :, :, ;,,,,, ; (, ( 问题探究 :(1 (2 (3 2 1 2 2 1 2 :,, : 56
解题方法指导 1 1,,,,,,,,, 2 2 (2004 2 1 3 (a (b,, 2 1 3, 1;3; ( 3,,, 57
,,,, 基础达标演练 1 ;,,, 2,, ( ; 2 m/s, 15 min m 3,, 4 2 1 4(a (b,,, 2 1 4 5,, 2 1 5,, : 2 1 5 58
6 : ;,, 59 7, A C B D ( 8(2006 2 1 6,, ( 2 1 6 A B C D 9, ( A C B D 10 ( A B C,, D 11, ( A C 答案与提示 1 ; B D 2 ;1800( :, 3 ; ( :, 41;2( :
5 ; ( : 6 ; ( :,, 7B( :, 8A ( :,, 9D( :,, 10D( :A, B C, D 11B( :, 难点指津 5,,,,,, 6 (1,, (2,, 60
7, : (1,, ;, (2, (3, 综合延伸 3 4 2 1 7,, ( A B C, D, 2 1 7, (,, :, ;,, ;,,, D,, 5,, 61
, ;, : ; ;,,,, 1(2005 2 1 8, ( A C B D 2 1 8 2(2005 ( A B C, D, 3(2005, ( A,, B,, C,, D,, 62
4(2005 1975 7 15, 19, 19 ( 5(2005,, 6(2005, ; 7(2004, :,,, 8,, ( 9 10,,, 答案与提示,, 1B ( : 2D ( : A, ;B ;C, 3B ( : 4 ( : 5 ; ( : 6 ; ( :, 7 ; ( 81 ;2 ;3, 63
9 ; ( : 10 ; ( : 视野情境扫描,,,,,,,,,,,,,, 22 :(1 ; (2 ;, :(1 (2, 64
SI 1,,,,,,, : ;,, 1960,,, SI 2 m (km, (dm (cm (mm ( μ m (nm : 1km=10 3 m;1dm=10 1 m;1cm=10 2 m; 1mm=10 3 m;1μm=10 6 m;1nm=10 9 m 3 s (h (min, (ms ( μ s : 1h=60min;1min=60s; 1s=10 3 ms;1ms=10 6 μs 4 5 (1 :, ; ; 65
2 2 1 2 2 2 (2, (3 (4, (5 = + + 2 2 2, 104, 005, cm, 1045cm (6 (7 6 (1, (2, 100% 100%,, (3 :, 问题探究 600 300,, 2 2 3 2 2 3 66
: : : : :, :, :,,, h1 h2,,, :,,,, 解题方法指导 1 1 12 45,21 15, min, 1h=60min, 12 45 21 15, 510 2 25km=25km 10 4 dm=25 10 4 dm,,, :25km=25 1km=25 10 4 dm= 67
25 10 4 dm,,, 2 3 (, ; 185cm; 1802 mm,,, 基础达标演练 1 2 2 4, cm 2 2 4 2, 2 2 5 A ; B ; C ; D,, 2 2 5 3(2006 2 2 6, 68
2 2 6 4,,1 nm =10 9 m 01 mm, nm 5 30 (,1 =254cm, 35 cm 500 s, min 03nm, m s 10, 2 2 7 6, 2 2 7, :(1 ; (2, mm 7, 8 2 2 8 a b c, ( Aa Bb Cc D 2 2 8 9, ( A, B, 69
C,, D 10 1 mm,, ( A5010cm B98650m C657mm D0645dm 11, ( A60g,08mm B60g,80μm C6g,08μm D6g,80μm 12 4, ( A1731cm B1732cm C17 52cm D1730cm 13 1 ( A250cm,19mm B250mm,19cm C250mm,19mm D250cm,19cm 14,1nm=10 9 m, 01~100nm, 176 10 9 nm ( A C 答案与提示 1 ;278( 279 280 2A285s;B98s;C349s;D14162s 3268 410 5 5m;8890 ;8 ;20 ;3 10 10 B D 610 L;d=L/10,428 7 h,, D, 2 2 9, V = 2 2 9 70
π( D 2 2 h 8D 9B( :, 10C( : 11B 12C( :1752cm, 13C ( : 14A( : 难点指津 7 2 2 10,,, 2 2 11,,,, ( 01s,, 2 2 10 2 2 11 71
8 72,,,, (1, :, (2 :1mm 1cm 1dm 1m,, 9,, : (1,,, (2 (,, (3 (,,, (4,,, 10 (1,,,, (2,,
综合延伸 3 4 2 2 12,,, n, l L= ;, 5 mm,10 mm,,, 2 2 12, L= n,,, nl 5 ( (A, (B 12 ( 2 2 13, L 60km, L km L 300km AB 5, L 5 60km=300km 300km,, AB 4 73 2 2 13 6,, :
,, (, n, n L, 2 2 14, :d= L n 5 2 2 14 7 ( A, B C, D,,, A A,, ( 1, ( A B C, D, 2, A168cm 69g 340m/s B168dm 60g 340m/s 74 ( C168m 60kg 340m/s D168dm 6g 340km/h 3, ( A 9
B 60 C 168 D 18 4(2005 1725 mm, ( A B C 75 D 5(2005, ( A 100cm B 50kg C 10m/s D 50 6, : 1225dm, 1252dm, 1224dm, 1224dm, 7 1m( 2 2 15, 8 9,,,, 2 2 15, 10(2005 O, 2 2 16, A,, A B, 2 2 16, ( A B A, A, A,, 2 2 16 A, 30, A
, 30,, O, 30, O, 答案与提示 1C( :,, 2A( : 3D( : 4D( :1725mm=1725cm, 1725cm, 1725cm 5B( : 61252cm;1224cm( :, 1225 1252, 1224333cm,,, 7, n1,, n2 a= n1 1 2 m, b= n2 1 2 m 8 : : : :, L, d=l/π : : : 2 2 17, CD AB 2 2 17 9 :(1 ;(2 ;(3 10(1 (2,,, 76
视野情境扫描 14 20 80,,, 13, 1200 14 14,,, 14, 14,, 14, 14, 14,,,, 14, 23 :(1, (2,, :(1, (2 77
1 烄 { 烅 烆 2 (1,, (2, (3,, 3 (1 a, ; b,, a, 1s 1min 1h (2 (3 :, 1 : = v s t, v= s t, v s t (, v = s t 2 :, m/s,, /, km/h, m/s km/h, 1 m/s= 36km/h 78
:3m/s=3 1m/s=3 36km/h=108km/h 4 (1 v= s t s=vt t= s v (2 :s=vt, ;t= s v (3 : v= s t s=vt t= s, v s (m t(s v (m/s s(km t(h v(km/h (4 s v t s t t s v s ( t 问题探究 1 : 2 1: ; 2: ; 3: 3, :, 4 2 3 1 : s2=10; 1 s1=5 2 5 (, 0 2 3 1, t1, s1; 3 10, 79
t2, s2; 4,,, ( 5 (1,,, (2, : S1 t1 V1 S2 t2 V2 6,,,, :, 解题方法指导 1 1, 2 3 2 2 3 2 80
2 3 2(a 2 3 2(b 2 3 2(a ;, 2 3 2(b 2 3 2(a,,, ; 2 3 2(b, : 2 2 50 m :7s 62s 74s, :s=50m,t1=7s,t2=62s,t3=74s :v v v v= s t : v = s = 50m t1 7s 714m /s; v = s = 50m t2 62s 806m /s; v = s = 50m t3 74s 676m /s :,, 3 2 3 3,AB=15 m,bc=10 m,bd=60 m, A, B, C, 6 m/s D, D s, m/s, B D t1 C D t2 81
B D t1 C D t2, :t1=t2, v= s t, B D : t1= sbd v1 = 60m 6m/s =10, :v2= scd = 70m t2 10s =7m /s 2 3 3,,, 基础达标演练 1,,,1m/s= km/h 2 2 10 8 m/s, 4 10 7 m, s 3,10s 80m, m/s,, 5 min, km 4, 2 3 4 A,, 7 ; B,, 7 48, A B min, A B km/h 2 3 4 5 340m/s,,, 7, km/h; 384 10 5 km, 82
h( 6 ( A001m/s 83 B1m/s C50m/s D100m/s 7(2004,,,, ( A B C D 8,4s 20m, 2s ( A20m/s C5m/s B10m/s D 9 40076km, 250 m/s, ( A1603 C445 B1603 D0445 10 400m, 300m, 100m, ( A 300m, B 300m, C400m, D400m, 11, 4 2004 4 17 19 23, Z20/19, Z20/19, 1200km, 115h, 160km/h, m/sz20/19 km/h 12(2004,,,,
(1 2 3 5,, 100 m 72km/h, 12 m, 12m/s (2 2 3 5, (, 答案与提示 1 ;m/s;km/h;m/s;36 202( :t=s/v 38;24( : v=s/t, s=vt 448;100 58568;448 6B( : 7D( : 8C( :, 9C( :t=s/v 10C( : 7 11444( 44;1043( 104 12(1,v =72km/h=20m/s, :t = s = 100m v 20m/s =5s, :t = s = 12m v 12m/s =10s t >t, (2 : : :1, 2 : :1 2, : :1, 2, 84
难点指津,,,,,,, : 5,, : (1 s v t;s1 v1 t1;s2 v2 t2; (2 s v t s v t ;s v t ; (3 s v t ;s v t ;s v t, s v t, s1 v1 t1, 6,,, (1,, (2 (3, (4, ( 7 (1, (2, (3 :, ;, (4 ; 85
v1+v2+ +vn, n, v= s t,,, 综合延伸 3 4,, 8m/s 500s, 72km/h 100s :(1 ;(2,,, :v1=8m/s t1=500s :(1s1(2v (1s1=v1t1=8m/s 500s=4000m v2=72km/h =20m/s t2=100s (2 s2=v2t2=20m/s 100s=2000m, v= s1+s2 = 4000m+2000m t1+t2 500s+100s =10m /s, 4 5 A B A B (B A,, A 800 m,,,, B 500 m,, v1 v2,, 86
s, v1 v2 : 烄 800m = s-800m, 1 v1 v2 烅 s-800m+500m = 800+s-500, 2 烆 v1 v2 1 2 : 800m s-300m =s-800m s+300m s1=0m(,s2=1900m,,, 1(2005,,, 1059s, ( A1030s B1059s C1088s D1018s 2(2005, ( A, B, C, D, 3(2005 A B C D 2 3 6 A B C D A B C D, ( 2 3 6 87
4(2005 1916 m, 480m, 2 3 7, ( A1724s B479s C432s D12s 5(2005 5s 1000m, m/s, km/h m/s 2 3 7 6(2005 2 3 8,, :(1 ;(2 7(2005,, 2 3 8 (s 146 135 139 8,, 1s (, 12s, 答案与提示 1C ( :t=1059s+ 100m 340m/s =1059s+029s=1088s, C 2A( : v=s/t, 3A ( :,, A 4C ( : 40km/h 5200;720;04~2(, ( :v= s t = 88
1000m 5s =200m /s=720km/h,v =12m/s 6 ; ( :, 7 ; ( : 8,, 2 3 9, s1, 1s,, 2s2+s1, 12s+1s=22s, s=s1+s2 s1=v t1=340m/s 1s=340m, s1+2s2=v t2=340m/s 22s=748m, s2=(748m-340m/2=204m, s=340m+204m=544m 视野情境扫描 89 2 3 9,,,,,,,,,,, ; (,,,, (,
, 19,,,,,, 24 :(1 (2 (3 (4,,, :(1 ( (2 1,, ( : (1, (2, 90
2 (1,, (2,,, (3 1, 2 :, 3, 4, 3 (1 :,, (2 :1,, 2, ;, 3 4 (3, 4 (1 1 : 2,, (2 ;, ;, 5,,, (1 :, 91
92,, (2 :,,, N,, 1N;, ; 600N (3 :, 6,,,,, (1 :,,, (2 :,, (, 问题探究 :,,,,,, :, : :, ( 2 4 1 : (1, ; (2, 2 4 1 ; (3, ; (4 :
解题方法指导 1 1 2 4 2, : 2 4 2 2 4 2,,, :,,,, 2 2 (2004 2 4 3,(1,3 : ;, : (2,, 93
2 4 3, 3 ;, (2, (1 ; (2,,,, 3 3 (2004, A B ( 2 4 4, A,, A B,, A :, 2 4 4, 基础达标演练 1, 2,, ;,,, 94
3, 4(2006 2 4 5, 獉獉 ( 2 4 5 A B C D, 5 ( 獉獉獉 A,, B C D, 6 ( A, B, C D 7, ( A 95 B C D 8, ( ( A,, B, C,,
D, 答案与提示 1 ; 2 ; ; ; 3 ; 4D 5C ( :,, 6D ( : 7B ( : 8ACD( :B 难点指津 7 (1 (2,, (3, (4,,, 8 (1 ; (2, ; (3, ; (4 (,, ( F : 96 2 4 6 : 2 4 6(a, : 2 4 6(b,
9 (1 ; (2, ; (3, ; (4 ( 1cm, ; (5, ; (6 (,, ( F 综合延伸 4 4 6N,, 2 4 7,,, 5 2 4 7 5,,,,, (,, 2 4 8,, P, (,, 97
2 4 8 1(2005 2 4 9, ( (1 (2 2(2005 2 4 10,,, 2 4 9 2 4 10 3(2005 ( 2 4 11, 4, :, 2 4 11, 2 4 12 ( : 2 4 12 98
(1 1 2, : (2 1 4, : (3, : (4, 答案与提示 1(1 (2 2 ; 3 2 4 13 4(1 (2 (31;3 2 4 13 (4 ( : 1 2, 2 1, 2, 1 4, ;,,, 1 3 视野情境扫描 : :(1 2 4 14, A, (2, A 2 4 14, :, : 99
25 :(1,,, (2,, :(1, (2 1,,,, : (1 :,,, (2 :,,,, (3 :, 2 (1, 100
(2, (3,, :, :, (1 (2 (4,, 3 (1 :,,, 1 ; { 2 (2 1 2, :,, 问题探究 2 5 1,, (1, ; (2, :, :,,, 2 5 1, (1,, (2, 101
,, :, ; ;,,, 解题方法指导 1 1 2 5 2, F A, A ; F,A, A ; F,A, A ; ; 2 5 2, :, 2 2 ( A, B C D, B, ;C, ;A,, ;D 102
, A D AD,, 基础达标演练 1,,, :, 2 (, : (1, ;(2, 103, ;(3,,,, ;(4,,, ;(5 :,,, ;(6 :, 3 1 2 :,, 4,,, 5,,,,,,, 6,, ( A B
C 104 D 7 ( A, B C, D, 8, ( A, B, C, D 9 ( A, B, C, D 10, ( A C B D 11(2005 ( A, B, C, D, 答案与提示 1 ; 2(1 (2 ; (3 ; ; (4 ; ; (5 ; (6 3 ; 4 ; ; 5 ; ; ; 6B ( :
7D ( : 6 8D( :,, 9D( :,, 10D ( :, 11C( :A B,D 难点指津 4 (1,,,, (2,,, (3,, 5, ;, ; ;, 6 (1, : 1 ; 2 ( ; 3, (2, : 1 ; 2, ; 3, 105
综合延伸 3 3 (2005, ( A,, B, C, D, A B D, C,,, C 4 (2005,, 2 5 3 ( A B C D 2 5 3,,,,, D 5,,,,,, 106
4 6 (2004 2 5 4,,, ( 2 5 4 /m 027 042 079 A, B, C, D,,,,,,,, B B,, 1,, 2 2 5 5, A, E, A, A,, A,, 2 5 5 107
3 2 5 6, a, Aa Cc Bb Dd ( 2 5 6 4(2005 2 5 7( (, ( A ( B ( C D 2 5 7 5, ( A, B, C, D, 6, 2 5 8, ( 1 2 3 4 A1 2 C2 3 B1 3 D2 4 2 5 8 108
7,, : (1 ; (2 8,,,,, 9(2005,,,, 2 5 9, : 1, ;2, ;3, ;4,,,, (, ( ( 2 5 9 10(2005,,,, ( 答案与提示 1 ; 109
110 2 ; ; ; ; 3A( :, 4B( :,,,, 5D( :A B C, A B C,, D, 6C( : :,, :,, ;,,,,, C 7 :(1 ;(2 ;(3 ;(4 ;(5 ;(6, ;(7, ; (8, ;(9 8,,,, 92;134 23 1 4( :,,,, 10,,,,, ( :,, 视野情境扫描,, 1371km/h,,,,
,,,,,,,,,,,,,, ( 3, 36 1, 1N ( A C 111 B D 2, ( A, B, C, D, 3, ( A B C D 4,,, ( A B, C,
, D 5, ( A B C, D 6, ( A3636s B4528s C6740s D12215s 7(2004 2 1 ( A55cm C550cm B55mm D550mm 2 1 8, ( A B, C, D, 9(2004,,, ( A B C D 10(2004 ( A C B D 11(2005, ( A B 112
C D, 12 ( A B C D ( 1, 23 13,,, 14 12 45,21 15, min= s 15 2 2 A ; B,, :A B 2 2 16 ( : (136 10 5 nm= m; (21h20min= s 17 :(1 ;(2 ;(3 : A B, 113
C,,, 18(2005 : ( 235, 110m 852, 1200, 1688, 1 19(2004 400km/h, 104km/h, 208km, h 20,,, 21,,, ;,, ( 4, 16 22 2 3, 45, 200N, 23 2 4, A 5N, 2 3 2 4 24 2 5, 2 5 25(2004, 1000 m, 800m, 4min10s 3min20s, ( 114
(13 26,,,,, 2 6 A B ( 2 6, A,, B A F, A B B F, A B,,,,,,,,,,,,,,,,,, : 115
(1 116 1,, 2,, ( (2 1, F1, F2, ( AF1>F2 BF2>F1 CF1=F2 2, ( A, B, C D, E, 27(2005,,,,, d 15cm 20cm 30cm 50cm 30cm,, t 730s 412s 184s 68s 2 7 (1, (2 2 7 t d (3, t d :d,t, (4 t d, :, : (12 28(2005 2 8
, :, : 2 8 29(2004 18km, 2 9, / 30 3 10 8 m/s,, 256s, 2 9 100g 答案与提示 1C( : m= G 1N g 01kg= 2D( :, 3B( : 4C( :,, A ;,, B ;,, D,C 5A( :A 6D( : 7C( :, 8B( :, 9D( :,, 10D( : 11C( :A B D, 117
C C 12D( :, A ;, B ;, C, D 13 ; ; ; 14510min;30600s 154min;50s;2min;11s;35 16(10364 (24800 17(3;(1;(2 18g;m/s;km;dm;s 1907 20 ; ( : ; 21 ; 22 2 10 23 2 11 2 10 118 2 11 24 t, s, v= s t 25 26(11 ; ; 2 (21C 2D( : 27(1 t/s 730 412 184 68 (2 2 12 (3 (4t d 2 t 1/d 2, ( : 28 : : :,, 2 12
: : : ( 29 90km/h, 90km/h= 90 103 1 3600 m /s=25m/s 30s=vt=3 10 8 m/s 256s 1 2 =384 108 m ( :256s 119
[ ], ; ;,,,, 3 1 :(1 (2g=98N/Kg (3,, :(1 (2 1, G (1, 120
(2, (3, 2 (1 : a,,, g=98n/kg, 1kg 98N b G=mg m kg, G N, g=10n/kg (2 : ( 3 1 1 a (,, b 3 1 1 (3 : a, O b, 3 (1,, (2 : ; 3 1 2 3 1 2 3 1 3 (3, 121
;, (4,,, ( 3 1 3, 问题探究 :, : :,, :, :,,, :,,,,,,, 解题方法指导 1 1 3 1 4, 3 1 4, (, 122
,,, 3 1 4 :(1 ;(2 :, 2 2 4900N, 400kg 400kg, 400kg G=mg=400kg 98N/kg<4900N 400kg G=mg,, 3 3 (2004 3 1 5 A 3 1 5 3 1 6,, (A 3 1 6 4 4, 3 1 7,,,,, (, 123
:,, 基础达标演练 1,, 3 1 7 2 (,,, 3(1, (2,,g, 4,, 5 6 600N, ( A B C D 7, ( A B C D 8 ( A m=g/g, B, C, D 9 3 1 8, ( 3 1 8 124
10, 3kg,, 25N 11, 答案与提示 1 ; ; 2 ; ; 3(1 ; (2 ;G=mg;98N/kg; 1kg 98N 4 ; ; ; 5 ; 6C 7D ( : 8D ( :A ;B ;C ; 9C ( : 10 25N 3kg G=mg=3kg 98N/kg=294N>25N 11, 难点指津,,,,, 125
4 N kg G m G=mg (1 G=mg(g=98N/kg,, (2,, (,, ( (3 1kg, 98N, 98N, 98 N, 1kg 98N (4,, 综合延伸 5 g 5 3 1 9, m/kg 010 020 030 G/N (1, : 3 1 9 126
(2 (1, g,,g, g,, : 1g, 2g, 3g (1 3 1 9, :098N 196N 294N, 98N/kg, (2 g, g (1 (21 2 3 g,,, g = 1 6 g 6 6 : 3 1 10,,,,,,, ;,,, 3 1 10,, 127
7 7 (2005 3 1 11, 3 1 11 3 1 12,,,, 3 1 12,,, 1 ( A C B D 2 500~700N, ( A B C D 3 10 9, 588N, ( A5292kg,5292N C667kg,6533N B54kg,5292N D60kg,588N 4(2005, ( 128
3 1 13 5 1/6, 196N,, 6(2005 3 1 14, 7(2005 3 1 15, 3N, 3 1 14 3 1 15 3 1 16 8 15t, 9 10 3 N 3 1 16 9 196 10 5 N,, 3 1 17 ( (g 10N/kg 10, 答案与提示 3 1 17 1C( : 2B( : 3B( :m =588N 98N/kg=60kg,, 4 C( :C 52kg;327N 129
6 3 1 18( : 7 3 1 19 8 3 1 20 3 1 18 3 1 19 3 1 20 9 : G=mg=20 10 3 kg 10N/kg=2 10 5 N, 2 10 5 N>196 10 5 N, ( : 10 ( 3 1 21,, O,,, O, 3 1 21 视野情境扫描,, :,,,,,,, 130
,, 3 2 :(1 ; (2 :, 1 (1 :, (2 :,,,,,, 2,, (1 : F,, 131
132,, (2 :,,,,, N (3 3 (1,,,,, (2 1 : 2 (3 1 : 3 2 1 N 2 :, (4, : 1 ; 2 ; 3 ; 3 2 1 4, : 1 ; 2,, ; 3, N ; 4 4,
,,, 问题探究 :, :,,, : (1, l0 (2 ( G, l1 (3 ( 2G, l2 (4 ( 3G, l3 l l-l0 G 2G 3G 解题方法指导 1 1 3 2 2( (, ; ( N, N 133
,, 1,,, ( 33N 2 ; ;02;36 1 : N,, N, 2, 02N, 01N 3 2 2 2 60kg, 0~50N, G=mg G=mg=60kg 98N/kg= 588N,G, (, 2 3 3 2 3, A CD, 3 2 3 134 3 2 4 CD, CD : A 3 2 4,,
基础达标演练 1, 2, 3 3 2 5, (a (b 4,, 51N ( A B 3 2 5 C D 6 ( A, B C, D 7,,, ( A, B, C, D,, 8, F=F =4N, ( A 4N B 0N C 8N D, 9, A B C ( D 10 3 2 6, N, N,,, ( 135
136 3 2 6 3 2 7 11(2006 3 2 7 10N, 12 答案与提示 1 ; ; ; 2 ;N 3 4 ; 5C( : 6A( : 7B( : 8A( : B C 9B( : 105;16; ( : 5 ; 02N;,, 11 3 2 8 3 2 8 3 2 9 12
3 2 9,,,,, 难点指津 5 (,, : (1, (2 (3 (4 综合延伸 3 4 3 2 10,, :,,, 3 2 10 137
4 5 (, 3 2 11 : (1 (2 (3 3 2 11, ( 3 2 11 (N 0 0 19 098 147 196 245 294 392 (cm 2 3 4 5 6 7 75 75,, 2cm,,, (1 (2,,, (3B, 138
1, ( A B C D 3 2 12 2, ( 3 2 12 3 5N, 600g, 05N (g 100 200 300 400 500 600 (N 10 20 30 40 50 (1 (2, 4 3 2 13, 5(2005, 3 2 14 05N, 1mm (1 (2, 3 2 15 L F (3 L 3 2 13 F 3 2 14 139
1 2 3 4 5 F/N L/cm 答案与提示 1 ABC( : 3 2 15 2 3 2 16 3 (1 (2 ( :(1, 5N, 600g 6N;(2, 4 3 2 16 5(1 1 2 3 4 5 F/N 0 05 1 15 2 L/cm 25 3 35 4 45 (2 3 2 17 (3 视野情境扫描 3 2 17,, (,,,, 1N 2N, (, :,, 140
3 3 :(1,, (2 (3 :(1 (2 1,, f (1, (2 (3 (4 : ; 2 (1 : 1,, ;,, 2,, 141
142, ( 3 3 1,,, (2 :, 3 3 1, (3 :, ( 3, : : 问题探究 :,,, :,,, ( 3 3 2,, 3 3 2A,,, 3 3 2B,, 3 3 2C,,, : :,
解题方法指导 1 1, ( A B, C, D,, A,C D B,,,, C D 2 2,,, ; 3 (2004 3 3 3, ( 3 3 3 A, ;BD ;C,,B C D, A A, 143
基础达标演练 1,, ( A B C D 2,,,, ( A, B, C D 3, ( A, B, C,, D 4, ( A B C D 5,,, 6 200N, 50N F ( 3 3 4 N, ( 3 3 4 7,, ;,, 8(2005 3 3 5,, 3 3 5 144
答案与提示 1D( :, 2A( : ; 3B( : 4AC( :, 5 ; 650; ( ( :,, 7 ; 8 ; 难点指津 4,,,, : (1, ; (2 ; (3, ; (4,, ; (5 5,, 145
综合延伸 3 4 (2005 :1, ; 2, ;3, ; 4, ( A1 2 B2 3 C2 4 D1 4,,, ;,, D 4 5 (2004, 3 3 6, ;, ( 3 3 6 :,,,, :1 ( (, (, 2 (, (,,,, (,,, 146
1(2005,, ( A B C D 2(2005, ( A, B, C D 3(2005 ( A B C D 4, 3m/min,, 5m/min, ( A B C D 5,, 6, :A B C D E F G H (1 ( : ; : : ; : ; (2 :, 147
148 7,,,, 8, :A B C Ⅰ D Ⅱ E Ⅲ F G H I (1,, (2, 答案与提示 1A( :, 2C( : 3B( :A, C D,, B, 4C( :, 5, 6(1AEH;C;BG;D 7 ; 8 :(1ABCDEI (2 (2ABCFHI( : (,, :,, ;, 视野情境扫描, :, ;, ;,,,,,,,
;,,,,, ;,,, ;,,,,,,,,,,,,, 3 4 :(1 (2, : 1 (1 :,, (2,, (3, 149
,, 2 (1 :,,,, (2 :,, (3, (4, : 3 (1, : 1 ; 2 ; 3 ; 4, (2 : (3, 4 (1,, (2,, ;, 5 (1, (2, (3, (4,,, 150
问题探究 :,, :A : ; B : ; C : : ( 3 4 1,, 3 4 1 :A ye B :,, : B B ( 3 4 2,, :B ye,c 3 4 2 :,C A B,,,, : 解题方法指导 1 1 ( A B C D A,B,,D, 151
152 C, C C,,, 2 2,, ; ; 3 G, F, N, :F N ;F G ( ;G N, :,,, F, N,, F N ;F G,,G N, G N ; ;,,,,,, 3 4 ( A, B, C D,, A ;B,D, B D ;C,,
C C,,,, :,, 基础达标演练 1,,,, 2,, 3 (1;(2 4 400N, 300N, N 5(2005 ( A B C D 6, ( A B C D 7 400N 08m/s, ( A400N B200N C0N D800N 8 ( A B C, D, 153
9 3 4 3,F1 F2 ( 3 4 3 10 60kg, 5kg,, ( A637N, C539N, B637N, D539N, 11(2006 30N 500N, ( A 500N B 30N C 30N D 500N 12 3 4 4, A F1 F2, F1=120N, F2 答案与提示 3 4 4 1 ; ; 2 ; 3(1 (2 ; 40( : 5D( : 6A( : 7C ( :,,, 154
8D( : 9BD ( : 10B( :,,F=G 11D( :, ;, A :C, 12 A F1 F2, F1 F2 F2 120N, F1, A, ( 难点指津,,,,,,, 6,,,,,, 7 8 (1,, 155
(2,,, (3 ( (4, ;, ;,, ;, 综合延伸 4 5 30N, A30N B60N C0N D 60N ( :1 C, 0, 0,, ;2 B,, (,,, 0 A A 5,,, 6 (2005, ( A, B C D,, A,,,, B C 156
D,, 6,,, 7 (2005 3 4 5, F,F t v t t=1s t=5s, N 3 4 5, 0~2s 0, ;2~4s, ;4~6s, 4m/s F t,0~2s,f=1n;2~4s,f=3n;4~6s,f=2n, t=5s,, f=f=2n ;2,, 8 (2005,,, ( A, B, C, D B, 157
,,,, C,,, 0,,,, 7,, 9 (2005, ( A B, C, D,,, A C ;,, B D 10 (2005 ( A B, C, D,,,A ;,, C ;,,,, D B,, :,, 158
1(2004 3 4 6,, F1, F2,,,, 3 4 6 159 3 4 7 2(2005 3 4 7, A 10N, B 2 N, A, A N; B 3N, A,, A N, 3(2005 3 4 8,, 08kg, N, (g 10N/kg 4(2005 10m, 3 4 8 ( A B C D 5(2005, A B C D ( 6,,, (
A, B, C D, 7 8 10 5 N, ( A, F>8 10 5 N B, F=8 10 5 N C, F>8 10 5 N D, F<8 10 5 N 8(2006,,, 3 4 9, ( 獉獉 A 3 4 9 B C D 9(2005,, 3 4 10 3 4 10 :,, :,,, (1, (2, 160
答案与提示 1 ;=; ; ; 22; ;3 38; 4A( :, 5C( : 6AD( :,, B C ;,, A D 7BC( :,,, 8D ( : 9(1 ;,, (2 ;,, 视野情境扫描,, 3 4 11, A,,,, 3 4 11 AB, ; CD, ABCD O (, 161
3 5 :(1 ( (2 :(1 (2 1 ( 3 5 1 (1,,,, (2 : 1 : O 2 : F1 3 : F2 4 : L1 3 5 1 5 : L2 2, :,, 3 = F 1L 1=F 2L 2, :L1 L2 (1, (2, (3,F1 L1 F2 L2,, 162
4 F1L1=F2L2,, : (1 : L1>L2,F1<F2, (2 : L1<L2,F1>F2, (3 : L1=L2,F1=F2, ;, 5 ( 3 5 2 (1 O (2 ( (3 O 3 5 2 (4, L,L 6, 3 5 3,, ( s1, ( s2 问题探究 3 5 3 1: 3 5 4,, F1, F2; L1 L2; F1 F2 L1 L2,,,, 163
F1/N L1 F2/N L2 1 2 3 3 2 2 5 4 10 2 3 4 4 2 8 2: 3 5 5 1 F1, A B 3 5 4,,, 1 1, 2 3 5 5 3, :, 1, : 2,, :,, 解题方法指导 1 1 (2005 3 5 6( O OAB M 3 5 6( 3 5 6 164
2, ( A B, C D,, (, A C D,,, B,,,, 2 3 3 5 7,, ( AB, BB, A CC, A 3 5 7 DC, A :F1L1 = F2L2, L1>L2, L1<L2, A,, D, C 3 4 3 5 8,OB BA=2 1,G=60N,, ( A80N B 40N C 60N D 120N 165
, : F(,G ( F, G, F, L1 L2,30,L1 = 1 2 OA,OB= 2 3 OA, L1= 3,,F=80N 4 L2 FL1=GL2 3 5 8 A 5 (2005 (1 3 5 9, A ( 3 5 9 (2, ( (3,, ( (4,, ( (5, 166
,, (1 (2 ;2 (3 (4 (5, G1, L1, G2, L2 G1L1=G2L2L1<L2,G1>G2,,, 基础达标演练 1, F1(N L1(cm 167 F2(N L2(cm 1 6 4 3 2 3 2 6 2,,,, 3, G1=m1g, G2=m2g,, m1 m2 4,,,,,,, 5 ( A B C D 6 3 5 10, A, F C AC=15cm,CB=60cm, F G ( 3 5 10
A1 4 C1 5 B4 1 D5 1 7 3 5 11, ( A B C A D B, 3 5 11, 8(2005 3 5 12,,O,,, ( A B C, 3 5 12 D, 9(2006 3 5 13, ( 3 5 13 10 3 5 14, AD AE AF AC, ( A AD B AE C AF D AG 3 5 14 3 5 15 168
11 3 5 15, O, A F, G, F ( A B C D,, 12 3 5 16, 3 5 16 13 2m, 30N, 70N, 答案与提示 1( 8;( 4 2 ; ; ; 3 ;G1l1=G2l2;m1=m2 4 ; ; ; ; ; ; 5B( :, 6C( : CB AB 7C( :, 8D( : F1l1=F2l21 2G 3l=3G 2l : 2G 4l=4G 2l 9B( : B 10C( : 11C( :, 12 13 L, F1L1=F2L2,30N L(2m-L, L=14m 169
难点指津 7,,,,,, 8,, (, : (1 (2, (3, (4 9 (1 F1L1 F2L2,, (2 : F1 F2,,,, F1 F2, L1 L2, F1L1 F2L2,,,, 0, (3 1 F1L1>F2L2, F1 ; 2 F1L1<F2L2, F2 10 F1L1=F2L2,,,,, 170
(1 1, ; 2, (2 1 ; 2, (3,, 综合延伸 4 6 (2005,,, 3 5 17,,, A, 3 5 17, 3 5 17 7 3 5 18 3 5 18 171
, C A B B A 3 5 19 3 5 19 5 8 AOB 3 5 20,AO=BO, O, OA,, F1L1=F2L2,, F1L1 F2L2, 3 5 20,F1=GAO,F2=GBO,AO=BO, F1= F2, L1 =OC,L2 =OD<OH,OH=OC, L1>L2, 3 5 20 F1L1>F2L2, :,, F1L1 F2L2 6 9 (2004 3 5 21, 3 5 21 172
,,,,,, 10 (2004, 3 5 22,, 3 5 22, ( A C B D,,,,,, B,,,,,, A D, B C 1(2005, ( A B C D 2(2005 O, 3 5 23, L F, L FL, ( AL,FL BL,FL CL,FL DL,FL 3 5 23 173
3,, (, (, ( 4, (, 5(2005 3 5 24,,, ( 3 5 24 3 5 25 6(2005, 3 5 25,, A F1 B F2(, ( 7(2005, : ;, 8(2005,, (, 3 5 26,, L1 L2 3 5 26 3 5 27 174
9(2005, B, 3 5 27,, ( 10(2005 mm 3 5 28 L,L cm AB, L 3 5 28 175 3 5 29 11(2005 3 5 29,, : =, (, = (1 :, (2 12(2005 3 5 30, AOBC,O,AO=60cm,OB=40cm,BC= 30cm,, F L 答案与提示 3 5 30 1B( : 2C( :,,,, FL=GL, 3 ; ; ; ; ; 4 ; ( 5b;a( :, 6 ;
7 ; ( :,F=Gh/l 8 ; ; 3 5 31 9A ; 10131~135 3 5 32 3 5 31 3 5 32 11(1 ; 176 3 5 33 (2,,,, ( 12 3 5 33 ( : OC, OA 视野情境扫描, :,,, :,,,,,,,,, =,
:,,, :,, :,,,,,,,, 3 6 :(1 (2 :(1 (2 1 (1 :,,, 3 6 1,, (G,, ;,, 3 6 1, (2,,, 3 6 2 177
3 6 2 (3,, (,, 3 6 2 (4 :,,, :, :,, 2, 3 6 3,, 3 6 3 3 4 问题探究 : 3 6 4, (, 3 6 4, 178
( (N (N (N (N 098 098 098 049, 解题方法指导 1 1 3 6 5, ( A B C, D, 3 6 5 F,,,G,,, D D, ( 2 2,, :, 3 6 6,, : (N FA=10N 3 30 FB=75N 4 FC=6N 5, 3 6 6 179
,,,, 3 3 6 7,, 2/3, F=1/3G,, 3 6 7, 3 6 7 4 (2003 ( 3 6 8,, 3 6 8 3 6 9, 獉獉獉獉獉,,, 3 6 9,,, 180
基础达标演练 1,, 2,, 3 3 6 10 G(, F1 F2=, h h 4, 3 6 11, F1 F2 F3 ( AF1>F2>F3 BF1=F2=F3 CF1<F2<F3 DF2>F3>F1 3 6 10 3 6 11 3 6 12 5 3 6 12, F,,, ( A G2>G1 BG1>G2 CG1=G2 D 6 3 6 13, A G, F,, f, F A05G B2G C05f D2f ( 3 6 13 181 3 6 14 7 3 6 14, 20N, 12N,
, F ( A10N 4N B12N 24N C12N 4N D24N 12N 8 ( A B C 9 3 6 15, D 3 6 15 10 3 6 16, 500N, 05m 20cm, N 11, 1 70 N, 260N 2, 3 6 16 3, 12 90cm, 15cm, 240N, 13, 3 6 17,,, 3 6 17 182
答案与提示 1 ; ; ; 2 ; ; 31 1;1 1 4B( :, 5B(F=1/2G1,F=G2 6C( : 7C( : F, F=12 N, G+G =2F, G 8ABD( : 9 ( :, 10 3 6 18, L1,,, F 2r=GL2 L2=40cm, F= G 40cm 2r =200N 11 ( : n = G/F = 260N/70N=4(, 3,, 4, 3 6 18, 12FR=Gr,F= Gr R =240N 15cm 90cm =40N 13,, 难点指津 5 1 n, 2 n, 183
F= G n, ( n-1 n n n-1 2 n 2-1 n-1 2 n 2 综合延伸 3 5, 3 6 19,,, 3 6 19 (, 3 6 19,, : 2,, 3 6 20 6 (2005 3 6 21, 3 6 20,, 3 6 21 184
, 4 7 (2005 3 6 22, G, 3 6 22 3 6 23, 3 6 23,, 5 8 (2004,, 3 6 24, (a (b :, (b (c (d : 3 6 24 (a (b (c (d (a (b ; (b (c (d,, 185
;,, 1(2005 3 6 25, 2(2005 3 6 26, 3 6 26, ( 3 6 25 G/N F1/N F2/N 1 100 06 065 2 150 110 090 3 200 160 115,, 3 6 26 : (1 (2 3(2005 3 6 27,, :,, ( 3 6 27, ( 3 6 27 4(2005,, 186
, 5, S,, 6(2006 3 6 28, (, ( 3 6 28 7, : (1, 1 (2 (3, 1 2, 1 2, (4, 答案与提示 1 3 6 29 2 (1, (,F1 G/2, ; (,F2 G/2, (2 (, ( : ; : 3 6 29 187
(, ( : 3 (,, (, 4 ; 5,, 61;2 7(1, (2 (33/4, (4 视野情境扫描, 3 6 30 R r O, G, A F, ( 3 6 30, G F= R-r 2R G R, r R,,, 3 6 30 3 6 31 3 6 31 R r, L, 188
F G F= R-r G 2L L R, ( 1, 31 1, 2,,, 3 F 10N 4N A, A, (,, 4 400N 50kg,, N, 100N, 05m/s, N,, N 5 1000N,, N 6 5 2, 500 N, N 7 (, 8 500N, 1m, 02m, N 1000N, 9 3 1,,, 3 1 3 2 189
10 3 2 A B,A,B 11 3 3 A,, ( ;,,, ( 3 3 12 3 4 : (1, (2, ( 3, 30 3 4 13 3 5, ( 3 5 14 ( A B, C, D 15 ( A B, C, D, 16 3 6,, ( 190
A B C D 3 6 17 3 7 ( 3 7 Aa Bb Cc Dd 18 ( A B C, D 19, ( A 98 B C 191
D, 20 3 8,G=100N,, ( AB,F=50N CA,F=100N BA,F=50N DB,F=100N 3 8 3 9 21 3 9,G=50N, A B ( A25N 25N B25N 50N C50N 50N D50N 0N 22 3 10, ( 3 10 ( 4, 12 23, 3 11,, 3 11 3 12 192
24 3 12, 25, (18 26 (13 13,, ( (2, a 4 50g, c 50g,, 3 50g 3 13 27,, :a b c d e f g h (1 ( : (2 28 3 14 (9 3 14 29 3 15, OA O,OA 18m, O 06m B 120N C, OA, A N 答案与提示 1 ; ; 3 15 193
2 ; ; 34N; ; ;4N; 40( ;100; ;0 5500 6200 7 ; 8100;10 1 9 ; 10 ; 11C;B; 12(1 ;,, (2 ;,, 13B( : 14A( :,, D 15D( :, 16B( :B 17D( :D, 18D( :D 19A( :, 20B( :A,B,, 21A( :, 22B( :, 23,, ( 24, 25,,,,,, 3 16 261 26;e 194
27(1c d g (2 3 161,, 2,, 28 ( : 29 A OA,, ( 3 17 FOA=GL2, L2= 1 2 OB=03m,F= 120N 03m =20N 18m 3 17 195
[ ] 10% ~15%,,,,,, 41 :(1 (2 (3, :(1,, (2 1 (1 : (2 :, 196
(3 : F, N : 1 2 2 (1 : (2 :1,, 2,, 3, p= F S :p (Pa, F (N, S (m 2 (1 :, (2 : N m 2, N/m 2 (Pa 1N/m 2 =1Pa 1N/m 2 1N 4 (1 :, ;, ; (2 :, ;, ; 问题探究 :, 4 1 1 4 1 1 197
:(1, ; (2, ; (3,, :1 ; 2(a (c, ;3(a (b, (a,(b, :(1 (2(a (c (3(a (b 解题方法指导 1 1, ( A B C D, :, ;,, 4 1 2, ;,, C 4 1 2 C 198
2 2 (2004 4 1 3,, 4 1 3,,,,,,,, ; 3 3, 400kg, 2 10-2 m 2, : (1 (2 199 (3,, p= F S, (1F=G=mg=400kg 10N/kg=4 10 3 N (2p= F S = 4 104 N 2 10-2m 2 4 =5 104 Pa (3 :,,,,
4 4 4 1 4, ( 4 1 4,,, ;,, ;,, ;,, B, 基础达标演练 1 ( A B C, D 2(2006 4 1 5, ( 4 1 5 200
3(2005,, ( A B C, D 4 ( A, B, C, D,, 5 ( 4 1 6, (,,,, 4 1 6, ( A B, C,, D, 6(2005 360 N,, 0012m 2, Pa 7, 03N,, 10 10-3 m 2, Pa (, ( 8, (1, : ; (2, 201
202 : ; 9, :, A B C,, C,,, : (1 ; (2 10(2005 2005 3,,, 4 1 7, : ( 1600N, 16 10-2 m 2 : (1 ( (g 10N/kg (2, (3, 4 1 7 答案与提示 1D( :, 2C( :, 3D( : 4D( :,, A ;,, B ;,, C ; (F S, D 5D( : 615 10 4 ( :,,, S=2
0012m 2,p= F S = 360N 24 10-2 m 2 =15 10 4 Pa 7300; ; 8(1 1:, 2: (2 2: 2: 9(1 (2 10 :(1m= G g = 1600N 10N/kg =160kg (2p= F S = 1600N =10 5 Pa 16 10-2 m 2 (3,,, 难点指津,,,,,,,, 5,,,,,,, 6, p=f/s, F,S,p,,,,, : (1, ; 203
(2, ; (3, p= F S 7 (1 : ; ; (2 :,, 综合延伸 5 5, ( A B C D,,,,,, C C 6 6 (2005 4 1 8,, ( A, 4 1 8 B, C, D, 204
,, C 7 (2005,,,,, p= F S, 7 8 (2005 01m 2 300N, 3 10-2 m 2, ( A30Pa C1000Pa B3000Pa D90000Pa F=G=300N,, S=3 10-2 m 2 p= F S = 300N =1000Pa 3 10-2 m 2 C, 8 9 (2005, :,,,,,,, 205
(N (cm 2 (N (cm 2 (N (cm 2 1 6 0 10 2 90 15 3 12 20 4 30 10 5 45 15 6 60 20 7 30 20 8 45 30 9 60 40 (1, :,, (2, 1 2, (1 1 4,1 4,1 4,,, (24 7,6 9,1 6,,,, (31,, 2,, (14 7,6 9,1 6 (21,, 2,,,,,, ;,,,, 206
1, F ( 4 1 9, ( 4 1 9 2(2005 4 1 10,, 100g 130g 170g, ( A B C D, 207 4 1 10 3(2005, ( A,, B C D 4 4 1 11,, F1 p1;, F2 p2, ( AF1>F2,p1=p2 CF1<F2,p1=P2 BF1=F2,p1>p2 DF1=F2,p1<p2 4 1 11 5 (2006 6 10 3 kg, 600cm 2, N, Pa, ( (g 10N/kg 6 m/s,,, 9 10-6 Pa, 110m
, N 7(2005, 4 1 12, ( 4 1 13(a (b, (a (b,, 4 1 12, (c (a (c,, pb 4 1 13 : (1 208 (2 (3 (b pb, (c pc, pc( (4 (b (c, : 8(2005 60kg,, 01m 2 04m 2 (g=10n/kg 9 (2006,,, 10cm 2,, 125kg(g 10N/kg (1 (2 800cm 2,
答案与提示 1C( :, A D ;, B 2C( : p=ρgh, 3A( : B C D,, ;A,, 4D( :, 5 6 10 4 ;25 10 5 ; 63 10 8 ;01 7(1 ( (2 (3 (4 ( ( :, ;,,, ( 8F=G=mg=60kg 10N/kg=600N, p1= F = 600N =6000Pa,p2= F = 600N =1500Pa, S1 01m 2 S2 04m 2 p2<p1, ( :,, 9 (1p= F S =mg S =125kg 10N /g =125 10 4 Pa (2G2=F2=pS2= 10 10-4 m 2 10 3 N m2=100kg 视野情境扫描,,,, 50kg, 275N,,,, 2m, 10cm, 50kg, 209
013N,, 2mm, 4mm,,,,, 50kg, :,,, 00075,, 42 :(1 (2 (3 :(1, (2,, 1 1 4 2 1 2 210
(1, (2 (3, (4,, 4 2 1 2 (1 :, :,, :,, (2, (, 问题探究 : 4 2 2,,,,,,, :,, :,,,, 4 2 2,,,,,, 211
解题方法指导 1 1 4 2 3,, ( 4 2 3 A B, C D,, U, B B 2, 4 2 4,, (, 4 2 4 : : 212
,,,,, ;,, 2 3 4 2 5,2003 3, SARS,, SARS :, U, 4 2 5,,U,,, U, U,,, SARS, U, SARS 213
基础达标演练 1 4 2 6, :,U,, 2 4 2 7, 4 2 6 4 2 7 4 2 8 3 4 2 8,,, ( A B C D 4 4 2 9,,,, ;, 4 2 9 214 4 2 10 5 4 2 10,, p p ( > < =, 6,, :, 5,
(1 ;(2 ;(3 : : : (cm (cm 1 4 32 2 4 32 3 4 32 4 10 92 5 10 98 7 4 2 11,, A B C,, 4 2 11 4 2 12 8(2006, 4 2 12 ( A B C D 9(2004 4 2 13, ( 4 2 13 215
答案与提示 1 ; 2 ; ( :, 3B( :,, 4 ; ; ; ( : 5>; ( :, 6 ; (11 2 3 (23 4 (34 5 7C;A( : A B C,A, A ;C, C 8A 9A( : ; ;,, 难点指津 3 p=ρgh (1 :p ; ρ ; g ;h (2 :p(pa ρ (kg/m 3 h(m (3 :, ( (4 p (5 (6, 4,, p=g /S;, 216
p=ρgh 综合延伸 3 4,, 4 2 14, ( 4 2 14 A C B D,,,,, m=ρv,, p=ρgh,, C p=ρgh,, 4 5 (2003 66 m( 6 1,, 6 10, 135m g 10N/kg, ( A 66 10 5 Pa C 135 10 6 Pa B 69 10 5 Pa D 201 10 6 Pa, h=(135m-66m=69m, p=ρ gh=10 103kg /m 3 10N/kg 69m=69 10 5 Pa 217
B p=ρgh, h h,, 1(2005 3000t, 40km h, 10 6 N (1 30min, km; (2 ; (3 2m Pa; (4, 2(2005, :, (1 4 2 15, S1 S2, F, 4 2 15 F1 p1,, S1 F2 (2, ( 3(2005 4 2 16,, A B C pa pb pc : 4,,,,, 4 2 16,,, 4 2 17,, : (1 ; 218
(2 4 2 17 4 2 18 5, 1 m, 4 2 18, A, A,, B C D, A B C D, (1 (2, ( (3 3 : 6(2004,,, 4 2 19, 4 2 19 :, ; :, 219
S2 S1 答案与提示 1(120 (20 (3196 10 4 (4 2(1 p2= F1 ; F2=p2S2= F1S2 S1 (2 S1, S2( 3pA <pb <pc( :,C, 4(1 (2 ( :,,, 5(1 (2 (3 ( :1,,, 2,, 6 : ( ; : ; ( :,,, ;,, S1 视野情境扫描, 10m, 5 Pa,,,, 220
,,,,,,,,,,,,, 43 :(1 (2 :(1 (2 1 (1,, (2 :1, 2,, 221
(3 : (4, 2 (1 : :1, 1, 2,, 3, (2 : (31 :1 760mm 1 =1013 10 5 Pa 10 5 : 1, 2 3 4, 3 (1 :1 :,, 2km, 10m, 111Pa2, (2 :, (3 :,,,,,,, (4, :,,, ;, 222
问题探究,, : (1 :,,, 4 3 1 4 3 1 (2 :, ;,, 解题方法指导 1 1 4 3 2,,,,,, 4 3 2,,, 4 3 2,,,, ;,,, ; 223
2 (2005 4 3 3, ( 4 3 3 A,,, ;B, ;C, ;D BD 2 3 4 3 4,, 1,2,3 4 3 4, 1,, 2, 3,, 1, 2 3 224
3 4 2003 5 22, m 4 3 5 kpa 4 3 5, 8848 m, 4 3 5,, 8848m 9km,,, 31 32kPa 8848;31( 32 5 4 3 6,,,, 4 3 6 225
,,,,, 基础达标演练 1 ( A B C D 2 4 3 7,,, ( A B C D 3, 4 3 7 4 3 8, ( A C B D 4 3 8 4 3 9 4 4 3 9, ( A B C D 226
5,,, 4 3 10 ( 4 3 10 6 4 3 11,, 4 3 11 7 4 3 12,,, ( 8 p t, t p : 4 3 12 1 2 3 4 5 t( 0 25 50 75 100 p( 10 3 Pa 100 110 120 130 140, p t : Pa 227
9,, 4 3 13 答案与提示 1A( : 2B( :,, 4 3 13 3A( :, 4B( :,,, 5B( :,,, A,, ;B,, 6 :,, :,,, 7 ( :, ( 8p= 100 + 2 t 10 3 Pa 5 9 ( ; ( ( :,,,,,, 难点指津 4 1m,, 228
, 4 3 14, h, p0, h1, AB, AB ( p =ρ gh+ρ gh1 AB, h1 p0, p =p0+ρ gh, AB 4 3 14, p =p, ρ gh+ ρ gh1=p0+ρ gh1 p0=ρ gh,, 5,, 综合延伸 4 6 (2005 ( A B C, D,,,A B C, D D 229
5 7 ( A, B, C,, D,,, p=ρgh A B ;,,C ;,,, C, 8 4 3 15,,,, ; (,, 4 3 15,,,, ;,,,, ;,, ; ;,, 230
6 9 (2004 1 10 5 Pa, :,,,, : 5N, 5cm 2 ( 4 3 16 (1 4 3 16 (2,, F=pS=10 5 Pa 5 10-4 m 2 =50N, (1 (2 F=pS=10 5 Pa 5 10-4 m 2 = 50N>5N, 10 (2005 : A, ; 4 3 17 B,, 4 3 17, F( ; C V; D L (1 A (2 S= 231
(3 ( F/N V/m 3 S/m 2 (4 P= (5 (,,, (1 (2V/L (3 L/m; p/pa (4p=FL/V (5 1, 76cm,, ( A 76cm C 76cm 232 B 76cm D 2(2005,,, ( A C B D 3(2005 2 m 2, 2 10 5 N, ( A, B,, C, D, 4,, ( A B C D 5,,, 80, ( A B C D
6, 7, 8,,,,, 4 3 18 9(2005, ( 4 3 18, (1 : ; : (2, 10(2005,, h/km p/ 10 5 Pa 0 101 04 097 08 092 14 086 20 079 4 3 19 (1, 4 3 19 (2, : (3 1km, Pa 3000km,, Pa (4, : 233
答案与提示 1B( : 2C( : 3D( : 4D( :, 5B( :,, n,,, 100, B C,,100, 100, C 6,,, 7,,,,,, 8,, 9( :, :(1 :,, (2,,, 10(1 (2 100m, 1000Pa (309 10 5 ;0 (4 视野情境扫描,,,,, (,,, 234
,,,,,,,,,,,,,,,, 44 :(1 (2, :,, 1 (1,, (2 :,, 2 4 4 1,,,, 4 4 1 235
问题探究, ( 4 4 2 :,, F1,, F2 : (1 (2 F1 F2, 4 4 2 (1 (2F1>F2;,,,, 解题方法指导 1 1 4 4 3, 2~3cm,,,, 4 4 3,,,,, 236
2 (2005 4 4 4 ( A, B, C, D, 4 4 4,, D,,, 2 3 1912,, 100 m,,,, 4 4 5, 4 4 5,,,,,,,,, 基础达标演练 1, :, ;, 4 4 6 237
2 4 4 6,, 3,,,, ( A,, B,, C, D,, 4 ( A B C D 5(1, (2 ( 4 4 7 4 4 7 4 4 8 4 4 9 6 4 4 8, 7, 4 4 9, : (1 (2 答案与提示 1 ; 2(1 ( :,, 3BD( :,,, 4ABD( :, 5(1,, 238
;,, (2, 6 :,, 7(1,, (2,,, 难点指津 3 (1,,, (2 :,, (3, 综合延伸 3 4 (2005 :, 4 4 10 A B C 4 4 10,, 239
: A :, 5 (2005 4 4 11 T,, A (,A (, A, 4 4 11 ; 1(2005,,,,, 2(2005 4 4 12,, ( A, B, 4 4 12 C, D, 4 4 13 240
3(2006, 4 4 13,,, ( A B C D 4(2004,, ( 4 4 14,, 4 4 14 5(2004, 4 4 15, 4 4 15 6(2005 2005 5 15,,, (1, (2 :, (3 8, 185 10 5 W, 16m/s, 241
(4,, ( 答案与提示 1 ; ( : 2D( :,,, 3C 4,,,,, ;,,, ( :,, 5 : :, ( :,,,,, 6(1,,, (2 (3P= W t =Fs t =Fv, f=f= P W v =8 185 105 =925 10 4 N 16m/s (4 : ; ; ; ; 视野情境扫描,,, : 4 4 16 4 4 16, 242
, 7~8cm,,,,,, : 3~4cm,, 05 m,,,, 4 4 17(a, 4 4 17(b,,,,,, 4 4 17 45 :(1 (2 (3 :,, 1 (1 : ( ( (2 :, 243
2 G,, F, :F =G-F 3, :, F >G, ; F =G, ; F <G, 问题探究 : : : : : :(1, ; (2, ; (3, : : 解题方法指导 1 1 (2005 4 5 1, ( 4 5 1 244
A,B,D C, 2 2 (2005, (,,, 3, 15N,, 10N,,, (, F =G-G =15N-10N=5 N,,, F <G, ;5N; 4 (2005 4 5 2,,, ( 245 4 5 2, ;,,,
,,, 基础达标演练 1, 2,, 3 10, N, 4 5 3, 4 5 3 4, 12N, 76N,, 5, ( A B C D 6 20N,, A C 20N B 20N ( D 7 a, ρ, h,,,, 8 1N,, 087N 答案与提示 1 ; 2 ; ; ; 246
310; 4 5 4 ( :,, 444N;044kg 5D( :,, (G (F (F,,, 0N, :F +F=G 6BD( :, 4 5 4, 7ρgha 2 ; ρ g(h+aa 2 ; ρ ga 3 ; ρ ga 3 8, (G (F (F, :F +F=G,F =G-F=1N-087N=013N 难点指津 4,,,,, (F = F -F 5 (1 (2 :,, ;,, 6 (1,, (2, ;, 247
综合延伸 3 5 (2005 10 N,, 20 N, N, (, N,F =G =20N, F >G,,,, 20; ;10 6 G1 F1, G2 F2, F1 F2(,G1=F1;,G2=F2, 4 7 (2005, ( A B C D (,,,,,,,, C 248
8 (2005, ( A B C, D,, ρ=ρ,, ρ =ρ, B, 1(2005, 98 N,, 75N, : (1, (2, ( 2,,( A B, C, D, 3(2005 4 5 5, ;, ( 4 5 5 A 249
B C D 4 4 5 6, a b ( A B C 4 5 6 D 5(2005 4 5 7,, A,, ( A B C D 4 5 7 4 5 8 6(2005 4 5 8, F, 答案与提示 1(1 (2 ( : ( :F =G-G =98N-78N=2N,,, F <G, 2D( :, 250
3A( :,, G =F,, G >F F >F, A 4C( :, ρ a>ρ, ρ b< ρ,,, 5C( :,, 6 4 5 9 视野情境扫描 4 5 9, 392,,,, :,,, 46 :(1 (2 (3 :, 251
1 (1 :, (2 : 1F ρ ( V 4 6 1 :,, 2F V ( ρ 4 6 1 :,, 4 6 1,, 2 (1 :, (2 :F =G =ρ gv (3,,F =G =ρ gv (4, : 1 :, ;, 2G,F =G 3V,,V = V ;, V <V 252
F >G F <G F =G F =G F +N=G ρ > ρ ρ < ρ ρ =ρ V =V ρ > ρ V <V ρ < ρ (,, 4 F =G =ρ gv,, 5, ρ ρ 问题探究 : : 4 6 2 4 6 2 253
:,, :, :, 1 2 3 124,, :, 1 3 5 1 4 5,,, :, 134,, 解题方法指导 1 1 (2005, 4 6 3 (1, (2 b c (3, (4 d e,,,, 4 6 3 254
,, (1a;b c d e (2 (3b c d (4 V; F; ρ, ; ; ( 2 2 (2005,, ;,,,, ;, ; 3 (2004 4 6 4,, 4 6 4,, ρ,v,,, ; 255
3 4 (2005 2 10 5 N,, ( A 2 10 5 N B 2 10 5 N C 2 10 5 N D 0 F =G =ρ gv, : ( ; ρ, V F=ρ gv A 5 1545t, 2060t,,,,, F =G, ρ V g=g =m g, V = m =1500m 3 ρ,f =G,, V =V =2000m 3, V =V -V =500m 3 基础达标演练 1 4 6 5 : (1,, (2 (3 : 256
4 6 5 2 4 6 6,,, A C B ( D 3 4 6 7 4 6 6, 4 6 7 (1 (2 4 5N, 06dm 3,, ( A,F =6N B F =5N C F =5N D,F =6N 5(2006 ( (, ( A B C D 6, 2/3 3N, N;kg/m 3, 257
, 4 6 8 N 4 6 8 4 6 9 7 4 6 9,,, : (1 ; (2 ; (3 答案与提示 1(1 (2 (3,, ρ = m V 2C( : ρ V 3(1 (2 4C( :,, 5B( :, 63;067 10 3 ;15 7(1 ( (2 :1 (, V1( h1;2, (,, V2( h2;3, V3( h3 (3 : ρ = V2-V1 V3-V1 ρ ( ρ = h2-h1 h3-h1 ρ 258
难点指津,,,, 3 : (1 :, F1,, F2, F =F1-F2 (2 : F, F, F =F -F (3 :,, F =G, : V =V ;,V <V (4 : :F =G, G =m g=ρ, gv : (1,, :,F =G ;,F =G-F; (,F =G+F(F (2, F =G =m g=ρ gv (3 G=mg=ρgV (4,, 4 : (1 :, G,, F, F =G-F,F =ρ V g, V = G-F ρ g 259
ρ = m = G V G-F ρ (2 : ( V1, V2, V3 ρ =V2-V1 综合延伸 4 ρ V3-V1 6 L, 2/3, 1/5, :(1 ;(2, : F1 G,, F2 G, : F1=G=F2 F1=ρ gv = ρ g 2 3 V, G=ρ gv, ρ g 2 3 V = ρ gv ρ = 2 3 ρ 067 103 kg/m 3 F2=ρ gv = ρ g 4 5 V = ρ gv, ρ = 5 4 ρ = 5 4 067 103 kg/m 3 084 10 3 kg/m 3 (1 067 10 3 kg/m 3 (2 084 10 3 kg/m 3 :,, 7 4 6 10, 50cm 3, 35N, ( g=10n/kg 35N, 35N,,, 260
F =ρ gv =10 103 kg/m 3 10 N/kg 50 10-6 m 3 =05N G=F+F =35N+05N=4N ρ = G 4N = =80 10 3 kg/m 3 gv 10N/kg 5 10-5 m 3 : 80 10 3 kg/m 3,, 4 6 10 5 8 (2005 ( 10000t ρ =10 103 kg/m 3,g 10N/kg : (1 ;(2,, (1F=F =mg=10000 10 3 kg 10N/kg=10 10 8 N (2V = m ρ = 1 107 kg =1 10 4 m 3 10 10 3 kg/m 3 9 (2004 4 6 11,, h,, 4 6 12, h ( 4 6 11 4 6 12,,F =G, : F =ρ gv,,v, h, ρ,h B h 0, C 261
C 10 (2005,, 4 6 13 10cm 2, 20cm,, 8cm, : (1 N (2 kg (3, ( g= 10N/kg (1 G, F =G, G=ρ gv =1 103 kg/m 3 10N/kg (10 10-4 m 2 008m=008N (2 m, : mg+g=f, m=ρ SL - G g =103 kg/m 3 (10 10-4 m 2 002 4 6 13 m-008kg=012kg (3 m, L, (2, m=ρ SL - G g, m=10 3 kg/m 3 (10 10-4 m 2-08N 10N/kg, m=l-008,m L,, L=008m,, 0, L=02m,m 012kg 1 4 6 14, A B C,,A,B, ( A, B, A B 4 6 14 262
C, FA>FB>FC D, ρ A > ρ B > ρ C 2(2005 100 ml,100 15ml 100ml,, 25ml, g=10 N/kg, ( A 10 10 3 kg/m 3,04N B 10 10 3 kg/m 3,025N C 10 10 3 kg/m 3,04N D 10 10 3 kg/m 3,025N 3(2005 ( A B C D, 4(2005 4 6 15, : (1, ( (2 246, (3, ( 4 6 15 5(2005 a 4 6 16( (, ( 263
F h ( 4 6 16 6 7, (1 : (2 ( : ρ = 8(2005 4 6 17,, ( ρ =09 10 3 kg/m 3, ρ =103 10 3 kg/m 3 4 6 17 4 6 18 9(2005 4 6 18, 027kg, 100cm 2,(g=10N/kg, ρ = 2 7 10 3 kg/m 3 : (1, (2, 264
10(2005,, 4 6 19 200g, 30cm 2, 15cm ( ρ =10 103 kg/m 3 : (1 ( :, 4 6 19 (2 ( (3 ( 答案与提示 1B( :, A,VA >VA ;FA =GA B,VB =VB ;FB =GB C,VC=VC ;FC <GC GA =GB =GC, FA =FB >FC F =ρ gv VA =VB >VC,VA >VB >VC 5,, VA >VB >VC, A 4,, FA =FB >FC, C V= m ρ 5,, m,v, ρ, ρ A <ρ B < ρ C, D V V m ρ 2A( :, ρ = ρ, ρ < ρ,,f =G=ρ gv =103 kg/m 3 10N/kg 40 10-6 m 3 =04N A 3D( :,, 4(136 (2 (315( :,, 5A( : V, V, 6 :, V1,, V2, F =ρ gv = ρ g (V2-V1 : m1, 265 1 2 3 4 5
,, m2, F =G =(m2-m1g( :, 7(11 V1 2, V2 3, V3 4 (2 V2-V1 ρ V3-V1 ( :, 8 :, G =F ρ gv = ρ gv V = ρ = 0 9 103 kg/m 3 =87 4%, V ρ 103 10 3 kg/m 3 V =1-87 4%=12 6%, V 12 6% 9 (1 4 6 20, V= m ρ = 027kg =1 10-4 m 3 27 10 3 kg/m 3 F =ρ gv =10 103 kg/m 3 10N/kg 1 10-4 m 3 =1N T =G-F =mg-f 4 6 20 =027kg 10N/kg-1N=17N (2, Δh= V S = 1 10-4 cm 3 100 10-4 m 2 =0 01m Δρ=ρgΔh =10 10 3 kg/m 3 10N/kg 001m =100Pa 10(1 G, 266
G =mg=02kg 10N/kg=2N,, F =G =2N (2, h, F =G =ρgsh h= F ρgs = 2N = 1 10 3 kg/m 3 10N/kg 30 10-4 m 2 15 m (3, (, h =15 10-2 m F =ρgsh =10 3 kg/m 3 10N/kg 30 10-4 m 2 15 10-2 m= 45N F, F=F -G =45N-2N=25N 视野情境扫描,,,,,,,,,,,,,,,,,,,, :,,,,,, 267
,,,,, :,, : (,,,,,,,,,,, ( 3, 30 1(2004, ( 4 1 2 4 2,, ( A B 4 2 C, D, 3 4 3,, 268
, ( A C B D 4 4 4,, F h ( 4 3 4 4 5 4 5,,,, ( 4 5 A B C, D, 6(2004 ( A B C D 7(2005,,, 4 6, ( A,, B,, C,, 269 4 6 D, 8, (
A B, C, D,, 9(2005 A, ( B 5000N C D 10(2004 4 7,, V >V =V, ρ 1= ρ 2> ρ3 4 7 ( AG =G >G ρ > ρ > ρ BG >G >G ρ > ρ > ρ CG >G =G ρ > ρ = ρ DG >G >G ρ = ρ > ρ ( 1, 20 11(2004 4 8, : 4 8 270
2450 m, 100 ( > < = 12 4 9,1 4,,( 4 9 2,,( 3 40 50,,( :(1 (2 (3 13 4 10,(1, (2,, (3(1 (2 4 10 271 4 11 14 4 11, a, ρ, m, 3 ( (1,
(2, (3 15, :1 (, 2 3 4 5 A( 6 B( ( : : 16(2004 4 12,,, (1 :, : (2 :, : 4 12 17(2005, 5 10 5 kg, N,, N,6000 m, Pa ( 10 10 3 kg/m 3 (10 18(2006 4 13,, 4 13 272 4 14 19 4 14,,,
20, 4 15,,,,, (20 4 15 21, (1 ; (2 ; (3 ( 22, 3, 5 5, 4 16, ( S2 (S1 S3,, 4 17 4 18( 4 16, (1, 4 16 (2,, (3 4 17, : (4, 40,, : p 02 MPa, 4 19, ( g=ρgh,g 10N/kg 273
4 17 4 18 4 19 (20 23(2004 20cm 3, : (1, (2 4 20,,, F 18N (3 L 10cm 24 4 20 (2004,,,,, 105 103kg/m 3, 12m,,, 05kg(g 10N/kg (1, 02m, (2 105 10 3 kg/m 3, 274
25 (2004,, 4 21,, AB, A,B, ( 4 22,,, 4 21 4 22 (1 4 21, (2 4 22,, (3, ( A B, C D 答案与提示 1B 2C 3B 4B 5C 6A 7B 8D 9C 10B 11, ;< 12(1,, (2,, (3 13(1 (2 (3, 275
14 : (1 :m =m (2 :mg (3 : m a 3 (4 :G =mg (5 :F =mg 15(11 4;,, (21 3 4;,, :(12 5; A A GA F F F =GA -F, F =ρ gva, ρ = F, ρ GA -F gva, (23 6; B, B, F =GB, F =ρ gv ;V =VB -V, ρ = GB g(vb -V, B,, ρ 16(1 : : (2 : : 175 10 6 ;5 10 6 ;6 10 7 18 4 23 19 :( 4 24: 4 23 276
4 24 20D ;C ; ( : U,, D,,, D, U EFG, G, C, C, D,,, 21(1 (2 ( (3,,,, 22(1 4 18;,, (2, S2 S3, S1, 4 17 4 18, (3 ( (4,p=ρgh=1 10 3 10 3=3 10 4 Pa<02 MPa 23S= V L =20cm3 10cm =2cm2 p= F S =18N = 18N =9 10 4 Pa 2cm 2 2 10-4 m 2 24(1 : p=ρ gh1=10 103 kg/m 3 10N/kg (12-02m=10 4 Pa F =G =mg=05kg 10N/kg=5N (2 F1 F2, F1=F2, ρ gsh1=ρ, gsh2 h2= ρ h1 = 10 103 kg/m 3 (12-02m =095m ρ 105 10 3 kg/m 3 095m 105 103kg/m 3 25(1 ( (2 (3AD 277
[ ],,, 5 1 :(1 (2, :(1 (2, 知识点精析 1,,, (1,, 278
(2 :1 F;2 F s 1,, ; 2,, ; 3,, 2 (1 :,, F s, F W =Fs (2 :,, J N m, J :1J=1N m, W =Fs, 3 (1,, (2, : ; ; 问题探究 :,,, : :, :, 5 1 1 5 1 1, F,, /N /m /J F=2 5 s=0 2 W1=Fs= G=5 h=0 1 W2=Gh= 279
(1 W1=Fs=25N 02m=05J, W2=Gh=5N 01m=05J (2,W1= W2, 解题方法指导 1 1 ( A, B 2m C D, A, B,, C,, C C,, 2 2 100N, F=10 N, 50m, F, 25m, F A500J B55J C750J D5500J ( F, F=10N, F s=50m, 25m F, 25 m, F A 280
3 (2005 2004, 110m 50g, 11m J, F,, :,, W =Gh=mgh=005kg 10N/kg 11m=055J 055,, W =Fs 基础达标演练 1, 2, :A ;B ;C ;D, ;E, ;F,, 3 02m/s 2000N,5s, J 4 10N,, 35m,,,, 10, 4m, J 5, 6, ( 獉獉獉 A, B, C, D = 7,,, ( A B C D 8 5 1 2,ma>mb>mc, F, 281
F s, F, ( A C b 5 1 2 282 B a D c 9(2005 2000 9 22, 75kg, 165kg ( A3 10 2 J B1 10 3 J C3 10 3 J D5 10 3 J 10 09m, 2000N, 02N, 500m, 11, 36km/h 10min, 20N 答案与提示 1 ; 2ABC ( :DEF 32000 ( :, 4800 ( :, 50J;0J( :,,,, 6AB ( :AB, 7C ( : : =,,, 8A ( :,,, 9C ( : F=G=mg=1650N, 15m, 3 10 3 J 10W =Fs=2000N 09m=1800J( :,
11s=10m/s 600s=6000m,W =Fs=12 10 5 J 难点指津 4 F s,, F, W =F s, :, G, h,, W = Gh, (, 5,,, : ( ;, (,,, 综合延伸 3 4 (2005 5 1 3, F 100 N, 5m, 20N, ( A 500J B 100N C 120N D 100J 5 1 3 283
,, F=f= 20N,s=5m, 100J, 0J D 5 (2005 19 10-2 m 3, 50N 10m, 1m ( : (1 (2 (g=10n/kg :, (1 ρ =m/v, m=ρv=10 10 3 kg/m 3 19 10-2 m 3 =19 kg (2G=mg=19kg 10N/kg=190N W1=Fs=50N 10m=500J, W2=Gh=190N 1m=190J, W = W1+ W2=690J, : 19kg, 690J,, W =Fs, W =Fs 4 6 5 1 4,, 22N, 3000 N 1 m, J, m 5 1 4 0,, 284
,,, W =Gh=3000N lm=3000j, W =W =3000J, W =FL, L= W F =3000J 200N =15m : 3000J, 15m :,,,, 1(2005, ( A B C D 2(2004 5 1 5 F, 40N A 5m, A 5N, F ( 5 1 5 A50J B25J C100J D200J 3(2006 5 1 6 ( 5 1 6 285
4(2005 3 m, 50 N,, 4m, ( A0J B300J C450J D500J 5, ( A, B, C, D, 6 60N 50N 10m, A600J C500J B0J D, ( 7(2005, 30 10 3 kg, 140 m, J 8(2005,,, 2km, 5 10 4 N, J 9(2005, 5 1 7 :(1 / (2 2min (3 F=1600 N, 10(2005 5 1 8, G 5 1 7 40N 5 1 8 286
(1 F1 05m, (2 30, F2 1m, F2 20N, F2 (3, 答案与提示 1C ( :A B D, 2B ( :, A 5m, F 25mA 5N, F 10N, W =F s=10n 25m= 25J 3C ( : A, 4B ( :, 50N,, ; 4m, 5 D ( : 6D ( :, 742 10 6 ;( : W =Gh, W =Gh=mgh=30 10 3 kg 10N/kg 140m=42 10 6 J 8 ;10 8 ( :, 9(1 v=90km/h=25m/s (2 v= s t s=vt=25m /s 2 60s=3000m=3km (3 W =F s=1600 N 3000 m= 48 10 6 J 10(1 F1 W1= F1h=40 05m=20J (2 F2 W2= F2s=20 1m=20J (3 : ; ( 287
( :,, 2005 3 18,, 04 /, 66 /, 2, 2900 /, 204 72 / 20, 3,,,,,,, 50%,,, 2 1,,,,, 288
5 2 :(1 (2, :(1 (2,,, 知识点精析 1 (1,, (2,,,,,, 2 (1 :, t W, :P= W t (2 :,, W J, s, W, :1 W= 1J/s=1N m/s W, :kw :1kW=10 3 W (1 : 289
, (2 : P, p (3 :P =20 W, : 20J 3 P= W t,, ( W t W, 问题探究 : 5 2 1, 5 2 1 :,,,, : 解题方法指导 1 1,, ( A B C D 290
,,,A,B ;,,, AC :,, 2 2 5 2 2, 3kg, 4s 05m,, (g=10n/kg 5 2 2 W =Fs,, F=G, W =Gh=3kg 10N/kg 05m=15J P= W t =15J =375 W 4s 15J;375 W, 3 3, :(1 m, : (2 : (3, :, P= W t =Gh t = mgh t, m h, t (1h t (2 (3P= mgh t 291
4 (2005 5m, 7m, 600N J, :, 5 m, 7 m W =Gh=600 N 5m=3000J, P= W t,, 3000;,, P= W t 基础达标演练 1, 1kW, 1min J 2, 3 5 2 3, A 196N F, 4s 1m, F J, W, A kg 5 2 3 292 5 2 4 4 4000kW, 200t, 002, m/s(g=10n/kg 5 5 2 4, : :,
6, 50 N 100N, 10s 10m, 5 2 5 7(2005, 5 2 5, 05h 360 m 3 5 m (g 10N/kg, ( A18 10 6 J B36 10 6 W C10kW D36 10 7 W 8, ( A B C D 9, ( A, B, C D 10 40N 90 N 1 m, 2s; 04 m, 15s W1 W2 P1 P2 ( A W1>W2 P1<P2 C W1<W2 P1<P2 B W1>W2 P1>P2 D W1<W2 P1>P2 答案与提示 1 ;6 10 4 2 ; ; 3196;49;2 4100 5 ; 650 W ( :, 7C ( :P=W/t=Gh/t=ρgVh/t 8C ( : P=Fv,, F v 293
9A ( : 10A ( :,, W1=F1s1 =40 N 1 m=40jp1 = W1 = 40J t1 2s =20 W,W2 = Gh=90N 04m=36J,P2= W2 A t2 = 36J =24 W 1 5s, W1>W2,P1<P2, 难点指津 4,,,,, : 5,,,,,,, t1 t2 6 W1 : = P1t1 = P1, W1 W2 P1 P2 t1 t2 W2 P2t2,, :, (, P2 294
综合延伸 4 5 5 10 7 N,, 003, 10s 200 m,, F f,, F=f, F,, :G=50 10 7 N,k=003,t=10ss=200m, F=f=kG=003G=003 5 10 7 N=15 10 6 N, W =Fs=15 10 6 N 200m=3 10 8 J, P= W t =3 108 J 10s =3 107 W : 3 10 8 J; 3 10 7 W 6 (2005, A, C, ( B, D, W =Fs,W F s,, ; P= W t, A B C,, D D :,, 295
5 7 (2005 5 2 6,,, ( A P >P B P < P C P = P D 5 2 6 : (1,, (2,, (3 P= W t A 8 (2004 5 2 7,,, (P (t ( 5 2 8 ( 5 2 7 5 2 8,,, :,,, P= W =F s t t =F v, :,, C 296
C,,,, 1(2005 5 2 9, 50kg, 10s 12, 02m, (g 10N/kg ( A1200 W B10 W C12 W D120 W 5 2 9 2 5 2 10, F m,, m 10N, m P 2 m/s, F, 5 2 10 ( A F 20N B F 5N C P 20 W D P 10 W 3(2004 04kg, 1min 180, 5cm,, 3 J, 10 W(g=10N/kg 4(2005 5 2 11 TY160 120kW, 17 10 4 kg, 125m 2 :(1 ; (2, 54km/h 15 m, 5 2 11 ( g=10n/kg 297
298 5(2005 40 m/s, 9 10 3 N, 1min 6(2005 5000 N, 10s 4m, : 7(2005 5 2 12,, :,, ;,,,, 5 2 12 16 (1 (2 8,,,, 180m, 700N,30s 30, h=50cm, 答案与提示 1D ( :W =Gh=50kg 10 N/kg 02 m 12=1200J,P=W/t= 1200 W/10s=120 W 2BC ( :F= 1 2 f=5n,p=fs/t=fv =F 2v =20 W 2 302;2 ( :, G=mg=4N, s=5 10-2 m,, W =Fs=4 N 5 10-2 m=02j t= 60 180 3 10 =01s, P= W t =0 2J 0 1s =2 W 4 (1 F=G=mg=1 7 10 4 kg 10N/kg=1 7 10 5 N,
p= F S =1 7 105 N 1 25m 2 2 =6 8 104 Pa (2 t= s v = 15m 5 4km/h = 15m 1 5m/s =10s, W =Pt=120kW 10s =1 2 10 5 W 10s =1 2 10 6 J 5s=vt=40m/s 60s=2400m, F=f=9 10 3 N, W =Fs=216 10 6 J, P=W/t=360kW 6 :G=5000N,h=4m,t=10s W =Gh=5000N 4m=20000J, P= W t =20000J =2000 W 10s 7(1 1 G( m2 h1 h2( L3 16 t (2 P= 16G (h1-h2 P= 16mgL t t ( : h1 h2 8 L1= 1 2 180m=090m, L2=180m F, G,, : G L1=F L2,F=350N P= hfn t =0 5 350 30 W=175 W 30,, MD-2,, 3700, 299