A particle of mass $m$ is placed at the centre of a uniform spherical shell of mass $3\,m$ and radius $R$. The gravitational potential on the surface of the shell is
A particle of mass $m$ is placed at the centre of a uniform spherical shell of mass $3\,m$ and radius $R$. The gravitational potential on the surface of the shell is
- A
$ - \frac{{Gm}}{R}$
- B
$ - \frac{{3Gm}}{R}$
- C
$ - \frac{{4Gm}}{R}$
- D
$ - \frac{{2Gm}}{R}$
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