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A couple questions about gravity.
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August 1st, 2010
1) Earth’s gravity peters out as you move away from it. But is its strength at all affected by how far you travel below the surface?
2) Assume a sphere with the same mass as the Earth. Now assume a hole running from the surface at a given point all the way through to the other side.
If one were to drop a ball into one end of the tunnel, what would happen to it?
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