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Is gravity a restorative force in oscillations?
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[QUOTE="rude man, post: 4942938, member: 350494"] Yes, until someone invents variable gravity! :smile: Actually, here's an example of variable and restorative gravity: suppose you drill a hole thru the Earth passing thru its center, and then drop a rock in at one end. As the rock falls into the hole and thru the center, once it's past the center gravity acts to restore the rock towards the center. One can show fairly easily that the restorative force is proportional to the distance of the rock from the Earth center, and always towards the center, making this a simple harmonic motion. (This assumes uniform-density Earth which of course is not really true, but it makes a dandyexercise!) But in your (and most) cases, gravity is constant so there's no restorative force coming from it. [/QUOTE]
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Is gravity a restorative force in oscillations?
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