Two satellites A and B move round the earth in the same orbit. The mass of B is twice the mass of A. which of the followings is correct ?

Speeds of A and B are equal The potential energy of earth + A is same as that of earth + B The kinetic energy of A and B are equal The total energy of earth + A is same as that of earth + B

Speeds of A and B are equal

$v\left(=\sqrt{\frac{GM}{r}}\right)$ is independent of mass of the satellite. |PE| = 2KE = $\frac{GMm}{r}$ ⇒  PE & KE depend on these ∴ $\frac{v_1}{v_2}$ = 1, speeds are equal