Ap physics c princeton review answers a satellite is in circular orbit around Earth. If the work required to lift the satellite to its orbit height is equal to the satellite's kinetic energy while in this orbit, how high above the surface of Earth is the satellite

Two masses are connected by a rope that hangs over a pulley as shown below. the pulley is a uniform cylinder of radius 푅=0.381meters and mass 푀=3.1푘푔. initially 푚"is on the ground and 푚#rests 2.5 meters above the ground. if the system is released, use conservation of energy to determine the speed of 푚#just before it strikes the ground. assume the pulley bearing is frictionless.