Physics Gravitation

The escape velocity of a sphere of mass m from earth having mass M and radius R is given by

1
\(\sqrt {\frac{{2GM}}{R}} \)
2
\(\sqrt {\frac{{GM}}{{2R}}}\)
3
\(\sqrt {\frac{{2GMm}}{R}}\)
4
\(\sqrt {\frac{{GM}}{R}}\)

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