J = m i r 2 i i
ϕ
1 = Rg R 2πR R T = = 2π = 84. 4 min ( 1) g 1
T = 2π m / k k T = 2π m/ k = 2π R / g = 84. 4min ( 2)
T = 2π l / g ( 3)
/ 0 20 40 60 80 100 120 /Pa 600.66 2338.1 7381.2 14934 47377 101325 198490
BC DE BD CE = =
= ABD l 1 = l2 = l 3 = l 4 AB DEF DE EF AB = BJ EK = DE BD EF DE = BD AB
G l = G l 4 i= 1 i i
3 2 3 F = k x + ( x ) = ( kx + x ) 0 0 0 0
E E = 1 2 mv m 2 E = 1 2 m i v i i 2
Fr = v gh v g h gh Fr 1 á á á á á á á á
13.5 240000 24 54400 1966 19.6 20000 1 5000 1983 8.39 3200 5 1058 1980 4.8 900 6 232 1978
K I PS = 4 BW Y ( a / W ) 3/ 2
5 D 3 W = D W 6
é
é é
A 0 B 0 6 7 C 0 80 D 70 110
2 2 V = V + 2gh V h V t 0 0 g 1 = ( gt) ( V0 cos β) 2 2 V tgβ = = V t V V 0 0 2 0 + 2gh ( 1) t V0 sinβ = Vr sinα V0 cosβ = Vr cosα u Mu = mv0 cos ( 3) ( 2)
tg = ( 1 + m M ) tg ( 4) M V0 tg = M + m 2 V + 2gh 0 ( 5)
Mm F r 2 2 2π 2 3 2 = r = r = 2. 7 10 m s T
2 a F r 1 2 = = = 2 g G r 60 1 a = 9. 8m / s 2 = 2. 7 10 3 m / s 2 3600
a = a 3 PR 3 T = P R max / 2
m d 2 x kx Q t 2 dt + = ( ) m kx Q t k / m f = 1 k / m x 2π
2 g 2l = gt t = 2 l / g T = 4t = 8 l / g T = 2π l / g
l
T/ = 2πl / 2l t = 2 l / g T = 2π l / g T = 2π l / g 2 ( 1 + / 16) 0 0 g F = sin l g sin F = l