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When a body like earth is moving in a circular path the work done in that case is zero because:
- Centripetal force acts in the direction of motion of the body
- Centripetal force acts along the radius of circular path
- Gravitational force acts along the radius of circular path
- Centrifugal force acts perpendicular to the radius of circular path
When a body like the earth is moving in a circular path the work done in that case is zero because centrifugal force acts perpendicular to the radius of the circular path.
Therefore, option (d) is correct.
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