A satellite revolves around Earth in a circular orbit. Does Earths gravity do any work on the satellite?
Work is force X displacement. I cannot find the displacement due to gravity in this question. Gravity is pulling down on the satellite in the direction of the center of the earth. That would always be perpendicular the the velocity of the satellite. If the satellite is in a constant orbit. It stays the same distance from the center of the earth. No displacement along the line of force due to gravity. So, No. HTH – hope this helps.
