Work is said to be zero when:

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A A force is applied and the body moves.
B No force is applied on the body.
C A force is applied but the body does not move.
D Both force and displacement exist in the same direction.

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Answer: C. A force is applied but the body does not move.

Work = Force × Displacement (in the direction of the force). If a force is applied but the body does not move, the displacement is zero, so the work done is zero.

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Work is said to be zero when:

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