R r r R r r x V A x V A
1 2 1 2 F = s mv 2 mv 1 2 2
u u 2f 2f u f u f (v)
Q = cm t = Q = Lm = Q = Lm Q = qm Q = W / J 2 Q = I Rt
1 1 1 1 = + + + R R1 R2 R n
2gl 4 3 B mgl = 1 2 mv 2 B v = 2 B gl 1 va 1 1 va = w = = v B = 2gl / 2 2 l 2 2
' m1 m2 v m m v v ' 2m1 m m v 1 = 1 2 = 1 + + 1 2 1 2 L m T = 2 T = 2 T = 2 LC g k 2
1 + 1 = 1 u v f
P 1 v
T l g l g a = = + 2 2 '
F G m m 1 2 r 2 1 2 F = K Q Q r 2
= m v 1 cm V