2. A 0.75-kg ball is attached to one end of a 1.25-m-long 0.5-kg uniform rod, and the other end of the rod is hung from a pivot. Suppose the maximum height reached by the ball is such that the pendulum is 30 from the vertical: (a) What is the magnitude of the torque about the pivot when the ball is at its maximum height? (b) What is the magnitude of the torque about the pivot when the ball is at its minimum height? (c) If the rotational kinetic energy of the rod and ball is 1.64 J, what is the angular velocity of the rod and ball when the ball is at its minimum height?