Two particles of masses m1 and m2 initially at rest start moving towar

1.	Two particles of masses m1 and m2 initially at rest start moving towards each other under mutual force of attraction. The speed of the centre of mass at any time t when they are at a distance r apart, is :
Answer» Correct option (d) Zero Explanation: The centre of mass will not move, because there is no external force. There is a force of mutual attraction under which centre of mass will not shift. Hence, speed of centre of mass is zero.

Two particles of masses m1 and m2 initially at rest start moving towards each other under mutual force of attraction. The speed of the centre of mass at any time t when they are at a distance r apart, is :

Answer»

Correct option (d) Zero

Explanation:

The centre of mass will not move, because there is no external force. There is a force of mutual attraction under which centre of mass will not shift. Hence, speed of centre of mass is zero.

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Two particles of masses m1 and m2 initially at rest start moving towards each other under mutual force of attraction. The speed of the centre of mass at any time t when they are at a distance r apart, is :

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