Two paricle A and B initially at rest, move towards each other under mutual force of attraction. At the instant when the speed of A is V and the speed of B is 2V, the speed of the centre of mass of the system is

Options

A. zero
B. `v`
C. `(3v)/(2)`
D. `(3y)`

Answer

A

Explanation

Initially , `v_(c.m.) = 0`
Since there is no external force , `v_(c.m.)` remains same. Therefore `v_(c.m.)` is always zero.