Posted by **arcos15** on Friday, January 25, 2013 at 4:15pm.

When we say that the weight of an object is Mg, and that g = 9.8 N/kg, what assumptions are we making?

Which of the below?

-The distribution of mass in the earth is spherically symmetric.

-The density of the earth is the same everywhere.

-The earth's interior is solid everywhere.

-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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