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 v and the speed of B is 2v, the speed of the centre of mass of the system is

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1.5 v

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Zero

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Solution

The correct option is D
Zero

As net external force on the system is zero and initial velocity of CM is zero, it will remain at rest.

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

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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 v and the speed of B is 2v, the speed of the centre of mass of the system is

The correct option is D Zero As net external force on the system is zero and initial velocity of CM is zero, it will remain at rest.

The correct option is D
Zero

As net external force on the system is zero and initial velocity of CM is zero, it will remain at rest.