15. What is the workdone by gravitational force on a satellite which revolves around the
1M
earth and covers a distance of 22500km in 24 hrs?
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Explanation:
When a satellite moves around the Earth, then the direction of the force of gravity on the satellite is perpendicular to its displacement. Hence, the work done on the satellite by the Earth is zero.
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orbit of a satellite is normally circular so when we talk about work
work = FScostheta
since force and displacement are at 90° cos theta = zero
work done = 0
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