Calculate the magnetic force due to a magnetic field of 780 MT on a wire of length 22.5 m traversed by a current of 55 A. The
.field makes an angle of 50° with the wire

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.