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A satellite revolves around a planet in a circular orbit of radius r. If the gravitational force on the satellite by the planet is F newton, what is the work done by the planet when the satellite covers 3/4 of the orbit

A satellite revolves around a planet in a circular orbit of radius r. If the gravitational force on the satellite by the planet is F newton, what is the work done by the planet when the satellite covers 3/4 of the orbit 

Grade:12

1 Answers

Shivam Chopra
45 Points
9 years ago
It is zero. It is because the satellite is revolving around the earth in an orbit due to centripetal force .
This centripetal force is due to gravitational force of earth & thus, it is inwards.
But, the displacement & velocitry of the satellite is tangential. So, Force is perpendicular to displacement & thus work done is zero.

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