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Question

A ring having non-uniform distribution of mass M and radius R is being considered. A point mass m0 is taken slowly towards the ring. In doing so, work done by the external force against gravitational force exerted by ring is

A
GMm02R
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B
GMm0R[1215]
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C
GMm0R[1512]
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D
Unpredictable
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Solution

The correct option is D Unpredictable
It is not possible to calculate the change in potential energy, as the nature of mass distribution is not known

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