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At what two distances from the center of the Earth, r, is the gravitational force on...

At what two distances from the center of the Earth, r, is the gravitational force on a point mass m equal to 1/4 of what it is at the surface of the Earth? Solve in terms of radius of the earth.

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ATE .อุ 快thj as 2 .23を 2 2 2- a 2R = +2*r and -2*r are the two answers required.

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