A body of mass m moving with a constant velocity v hits another body of the same mass moving with the same velocity v but in the opposite direction and sticks to it. The velocity of the compound body after collision is

Options

A. valid
B. 2v
C. zero
D. v/2

Answer

C

Explanation

Initial momentum of the system =mv-mv=0
As body stickks together `therefore` Final momentum =2mv By consevation of momentum 2mv=0 `therefore` v=0