For a satellite moving in an orbit around the earth,the ratio of kinetic energy to potential energy is

What is the ratio of the kinetic energies of two satellites at heights $R$ and $3R$ from the surface of the Earth? ($R$ = radius of the Earth)

The figure shows the variation of energy with the orbit radius of a body in circular planetary motion. Find the correct statement about the curves $A, B$ and $C$.

For a satellite orbiting around the earth in a circular orbit,the ratio of potential energy to kinetic energy at the same height is

In a satellite,if the time of revolution is $T$,then $KE$ is proportional to

$A$ satellite is revolving around a planet of mass $M$ in an elliptical orbit of semi-major axis $a$. What is the speed of the satellite when it is at a distance $a/2$ from the planet?