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Question

A dense sphere of mass is placed at the centre of a circle of radius . Find the work done, when a particle of mass is brought from A to B along a circle as shown in the figure.

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A

B

C

D

Medium

Solution

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Correct option is
A


From energy conservation,

Since speed does not change from A to B, KE remains same.
Distance of the particle at A and B is equal to  the radius of the the circle.

Hence,
Hence, work done is zero as there is no change in total energy E from A to B.

Video Explanation

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