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. v
B. 2v
C. Zero
D. `v//2`

Answer

C

Explanation

Initial momentum of the system =mv-mv= 0
As body sticks together `therefore` final momentum = 2mV
By conservation of momentum 2mV `= 0 therefore V= 0`