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What is the work done by the force of gravity on a satellite moving round the earth? Justify your answer.

Q. 11.     What is the work done by the force of gravity on a satellite moving round the earth? Justify your answer.

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The work done by the gravitational force is zero. This is because the satellite is moving in a circular orbit. Thus the direction of displacement of the satellite is perpendicular to the force of gravity. Hence work done is zero.

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