What is the work done by the force of gravity on a satellite moving round the earth? Justify
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When a satellite moves around the Earth, then 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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The satellite is moving on a round path, diobject is perpendicular to the direction of force. θ = ° 90 .
W= F s × Cosθ
= F s × ° Cos90
= F × 0 = 0
⇛Therefore work done is zero.
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