A body moving towards a body of finite mass collides with it. It is possible that

Options

A. both bodies come to rest
B. both bodies move after collision
C. the moving body stops and the body moving must have same mass
D. the stationary body remains stationary and the moving body rebounds

Answer

B, C

Explanation

When the second body is rest, velocities after the elastic collision are given by
`v_(1)=((m_(1)-m_(2))/(m_(1)+m_(2)))u_(1)` and `v_(2)=((2m_(1))/(m_(1)+m_(2)))u_(1)`
it is obvious that both bodies move after the collision. If `m_(1)=m_(2)` then `v_(1)=0` and `v_(2)=u_(1)`. Further `v_(2) ` cannot be zero. So, option b and c are correct.