Posted by NATTT on Friday, January 25, 2013 at 4:16pm.
-The distribution of mass in the earth is spherically symmetric.
Yes, if all the mass were under Paris, g would be very high there.
-The density of the earth is the same everywhere.
No, all the mass could be at the center
-The earth's interior is solid everywhere.
No, again all the mass could be at center
-The orbit of the earth is circular and not elliptical.
-We neglect the effect of astronomical bodies other than the earth.
-The object is at the earth's surface.
-Two significant figures are sufficient.
-Newton's law of gravitation holds.
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