In the same orbit, orbital sped of satellites remain same. When two satellites of earth are moving in the same orbit, then time periods of both are equal From Kepler’s third law T2∝r3 Time period is independent of mass, hence their time periods will be equal. The potential energy and kinetic energy are mass dependent, hence the PE and KE of satellites are not equal But, if they are orbiting in the same orbit, then they have equal orbital speed