A solid sphere of mass m and radius r rolls without slipping along the track shown in Figure P10.79. It starts from rest with the lowest point of the sphere at height h above the bottom of the loop of radius R, much larger than r. Figure P10.79 (a) What is the minimum value of h (in terms of R ) such that the sphere completes the loop? h = (b) What are the force components on the sphere at the point P if h = 3R? (Use R, m, r, and g for gravity, as necessary.) Fx = N Fy = N