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The earth moving around the sun in a circular orbit is acted upon by a force and hence work must be done on the earth by the force.

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The earth moving around the sun in a circular orbit is acted upon by a force and hence work must be done on the earth by the force.

(a) True

(b) False

The question was posed to me in an online interview.

The above asked question is from Conservation of Energy in division Laws of Motion of Engineering Physics I

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Right choice is (b) False

For explanation I would say: The gravitational force is a conservative force. So the work done by the gravitational force over every complete orbit of the earth is zero.

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