A body of mass 2 kg moving with a velocity of 3 m/sec collides head on with a body of mass 1 kg moving in opposite direction with a velocity of 4 m/sec. After collision, two bodies stick together and move with a common velocity which in m/sec is equal to

Options

A. `1//4`
B. `1//3`
C. `2//3`
D. `3//4`

Answer

C

Explanation

`m_(1)v_(1)-m_(2)v_(2)= (m_(1) + m_(2))v`
`rArr 2 xx 3-1 xx 4 = (2 +1) v rArr v= (2)/(3) m//s`