If mass of earth is $M$, radius is $R$ and gravitational constant is $G$, then work done to take $1\, kg$ mass from earth surface to infinity will be
If mass of earth is $M$, radius is $R$ and gravitational constant is $G$, then work done to take $1\, kg$ mass from earth surface to infinity will be
$\sqrt {\frac{{GM}}{{2R}}} $
$\frac{{GM}}{R}$
$\sqrt {\frac{{2GM}}{R}} $
$\frac{{GM}}{{2R}}$
If mass of earth is $M$, radius is $R$ and gravitational constant is $G$, then work done to take $1\, kg$ mass from earth surface to infinity will be
Potential energy of the $1 \,kg$ mass which is placed at the earth surface $= - \frac{{GM}}{R}$
its potential energy at infinite $= 0$
Work done = change in potential energy = $\frac{{GM}}{R}$
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