# science

posted by Derrick

How far away from the earth does acceleration due to gravity become 1% of its value at the earth's surface. Assume that the earth is a sphere of radius 638000000cm.

1. Steve

Let F = GmM/r^2 where r is as given.

F/100 = GmM/(10r)^2, so you have to be 10r away from earth's center.

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