A satellite moves around Earth in a perfectly circular orbit under gravity

PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A satellite moves around Earth in a perfectly circular orbit under gravity. Explain briefly why the work done by the gravitational force on the satellite during one complete revolution is zero.

Related theory

Work: Fundamental Definition
Work done by a constant force
Work, Energy and Power
Work
Scalar (dot) product of vectors

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