JEE PHYSICS MCQ: GRAVITATION

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Comets moves around the Sun in a highly elliptical orbit. The gravitational force on the comet due to the Sun is not normal to the comet’s velocity in general. Yet the work done by the gravitational force over every orbit of the comet is zero. Why?

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Correct option: A

The gravitational force is conservative, hence work done is zero

Option A is correct because gravitational force is a conservative force, and the work done by a conservative force over a closed path (like an orbit) is zero.

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