# Physics

How far from the center of the earth must a satellite be placed so that the acceleration due to
gravity is half the value at the surface? (Hint: the diameter of the earth is 1.3x107 m.)

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1. the acceleration at 1 radius is 9.8

Since F=k/r^2, half the value means 1/√(1/2) = √2 times the radius.

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