In the gure, a small block of mass m : 0.048 kg can slide along the frictionless loop-the-loop, with loop radius R : 20 cm. The block is released from rest at point P. at height h = 5R above the bottom of the loop. What are the magnitudes of {al the horizontal component and {b} the vertical component ofthe net force acting on the block at point Q? (c) At what height h should the block be released from rest so that it is on the verge of losing contact with the track at the top of the loop? (On the verge of losing contact means that the normal force on the block from the track has just then become zero). T '.P {a} Number n Units v {b} Number n Units v {c} Number Units v