What is the gravitational potential energy of a ball which is at R/2 distance above the earth’s surface (M is mass of the earth, R is radius of the earth and m is mass of the ball).
1
\( - \frac{{G\;M\;m}}{R}\)
2
\(+ \frac{{2\;G\;M\;m}}{{3\;R}}\)
3
\(- \frac{{2\;G\;M\;m}}{{3\;R}}\)
4
\(- \frac{{G\;M\;m}}{{2\;R}}\)