In the figure here, a solid brassball of mass 0.253 g will roll smoothly along a loop-the-loop trackwhen released from rest along the straight section. The circularloop has radius R = 0.13 m, and the ball has radius r <<R. (a) What is h if the ball is on the verge of leaving the track whenit reaches the top of the loop? (b) If the ball is released at height h = 7R, what is the magnitudeof the horizontal force component acting on the ball at pointQ?
