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
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統計: A(0), B(1), C(7), D(3), E(0) #3224657
統計: A(0), B(1), C(7), D(3), E(0) #3224657