問題詳情
11.A ball of mass mB is released from rest and acquires velocity of magnitude vB befor d. The ratio of the kinetic energy the Earth acquires to the kinetic energy the ball
(A)0
(B) (mB；/mE)2
(C)mB/mE
(D) 1
(E)mE/mB
參考答案
答案：C
統計：A:0,B:1,C:0,D:0,E:0
難度：計算中