Consider the elastic collision of two bodies A and B of equal mass. Initially B is at rest and A moves with velocity u. After the collision :

Options

A. the body A tracks, its path back with the same speed
B. the body A comes to rest and B moves aways in the direction of A' is approach with the velocity `v`
C. both the bodies stick together and are rest
D. B moves with velocity `v//2` and A retraces its path with velocity `v//2`

Answer

B

Explanation

When two equal mass collide elastically then velocities get interchange