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  4. Work done by gravitational force in one revolution of earth around the sun on its elliptical path is zero because

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Q. Work done by gravitational force in one revolution of earth around the sun on its elliptical path is zero because

Work, Energy and Power

Solution:

Gravitational force is conservative and hence it is independent of path, i.e. displacement is zero.
Due to this reason, work done by gravitational force in one revolution around the sun on its elliptical path is zero.