$A$ particle of mass $M$ is placed at the centre of a uniform spherical shell of mass $2M$ and radius $R$. The gravitational potential on the surface of the shell is

Write $SI$ and $CGS$ unit of gravitational potential.

The particles $A$ and $B$ of mass $m$ each are separated by a distance $r$. Another particle $C$ of mass $M$ is placed at the midpoint of $A$ and $B$. Find the work done in moving $C$ to a point equidistant $r$ from $A$ and $B$ without acceleration. ($G$ is the gravitational constant and only gravitational interaction between $A, B$ and $C$ is considered.)

Give the formula of gravitational potential at distance $r$ $(r > R_E)$ from the centre of the Earth.

Write an equation for the potential energy of a satellite. Why is the potential energy of a satellite negative?

Why does the potential energy of an object increase when it is raised above the surface of the Earth?