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Two particles A and B (both initially at...

Two particles A and B (both initially at rest ) start moving towards each other under a 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 is

A

zero

B

v

C

`(3v)/(2)`

D

`(3v)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
As no external force is applied on the two particles the speed of the centre of mass of these two particles does not change. Therefore, the centre of mass is at rest.
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