A body of mass m moving with a constant velocity v hits another body of equal mass moving with equal speed v but in the apposite direction and sticks to it. The velocity of the compund body after collision is

Options

A. V
B. 2V
C. zero
D. -2V

Answer

C

Explanation

`v = (m_(1)v_(1) + m_(2)v_(2))/(m_(1) + m_(2)) or v = (m(V) + m(-V))/(m + m) = 0`