A1500 kg car coast down a hill starting from rest and decreases its high by 22 m over a distance of 100 m of travel how fast will it be going at the end of the hill if friction has no effect in slowing its motion

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.