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Question

When a body moves in a circular path in a horizontal plane, the work done is :
(a) Positive
(b) Negative
(c) Zero
(d) Maximum

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Answer

(c) Zero

Reason — When a body revolves in a circular path under the influence of a force, on completing one round the displacement becomes zero, so the work done by the force is W = 0 because work done is a product of force and displacement.

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