Question

What is the wark done by the force of gravity an a setlite moving around.

Answer 1

When a satellite moves around the Earth in a circular path, then the force of gravity acts on it directed towards the centre. The motion of the satellite is in the horizontal plane. Therefore, the force of gravity of Earth on the satellite and the direction of motion of satellite are perpendicular to each other. Therefore, net work done = Fs cos 900 = 0. That is, the work done by the force of gravity on a satellite moving around the Earth is zero.

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Answer 2

Work done would be zero because there is a force but there is no displacement by the force of gravity..

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