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in Gravitation by (34.7k points)
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If the Earth revolves around the Sun in circular orbit then what would be the work done by the gravitational force?

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Gravitational force provides the necessary centripetal force, which at right angles to motion of the Earth, so by the relation W = Ed cos θ
∴ W = Fd cos 90 = 0
hence no work is done by gravitational force.

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