Two satellites of earth, $S_1$ and $S_2$, are moving in the same orbit. The mass of $S_1$ is four times the mass of $S_2$. Which one of the following statements is true ?

Question

( A ) The time period of $S_1$ is four times that of $S_2$
( B ) $S_1$ and $S_2$ are moving with the same speed
( C ) The kinetic energies of the two satellites are equal
( D ) The potential energies of earth and satellite in the two cases are equal