Why do we consider earth to be point mass knowing that mass of earth is uniform?

Asked by  | 15th Dec, 2012, 11:30: PM

Expert Answer:

there is no such thing as a point mass in the universe.
even an atom or an electron has a density.
it depends on what frame we are talking about.
eg. earth can be considered as a point mass in universe where distnces are very large and much bigger things are present.

Answered by  | 16th Dec, 2012, 09:43: PM

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