Asked by sue
could you estimate the mass of the entire earth? How? If we cannot direct measure the earth's mass, how was it determined?
Answers
Answered by
bobpursley
Easy. Take a known mass, say 1 kilogram.
put it on a scale, and weight it. It ought to weigh 9.8Newtons.
But this is the force of gravity:
F=GMe*1kg/radiusearth^2
solve for Me
put it on a scale, and weight it. It ought to weigh 9.8Newtons.
But this is the force of gravity:
F=GMe*1kg/radiusearth^2
solve for Me
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