What is the Work Done on the Earth by the Gravitational Force of the Sun During Its Motion Around the Sun?

Question

What is the work done on the earth by the gravitational force of the sun during its motion around the sun?

Short/Brief Note

Solution

The work done by the gravitational force of the sun on earth during its motion around the sun is zero because at every point, the displacement of earth is perpendicular to the gravitational force of sun i.e.,
W = Fd cos 90⁰ = 0

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Concept of Work

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