Two particles A and B initially at rest,...

Two particles `A` and `B` initially at rest, move towards each other by mutual force of attraction. At the instant when the speed of `A` is `n` and the speed of `B` is `3n`, the speed of the centre of mass of the system is

`3n`

`2Ns`

`1.5n`

`0`

Text Solution

Verified by Experts

The correct Answer is:

Net force on centre of mass is zero. Therefore, centre of mass always remains at rest.

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