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Question

Two particles of masses 2m and 3m are at a distance ′d′ apart. Under their mutual gravitational force, they start moving towards each other. The acceleration of their centre of mass when they are d2 apart is:

A
Zero
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B
12Gmd2
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C
8Gmd2
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D
24Gmd2
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Solution

The correct option is A Zero
Gravitational force is the central force
Here, there is no external force . So acceleration of central of mass is zero
Hence,
option A is correct answer.

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