Physics - Gravitation Question with Solution | TestHub

Gravitational potential on the surface of the shell due to the body of mass m is$V_{\text{b}}=-\frac{Gm}{R}$

Gravitational potential on the surface of the shell due to shell itself is$V_{\text{s}}=-\frac{GM}{R}$

$\therefore V=V_{\text{b}}+V_{\text{s}}=-\frac{G}{R}\left(M+m\right)$