Newtons law of gravity says that the gravitational force between two bodies is
Chapter 6, Problem 38(choose chapter or problem)
Newtons law of gravity says that the gravitational force between two bodies is attractive and given by F = GMm r2 , where G is the gravitational constant, m and M are the masses of the two bodies, and r is the distance between them. This is the famous inverse square law. For a falling body, we take M to be the mass of the earth and r to be the distance from the body to the center of the earth. So, actually, r changes as the body falls, but for anything we can easily observe (say, a ball dropped from the Tower of
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