Approximate the pulley as a thin disk. The pulley rotates around a pin A. The mass of the pulley is given by mp = 13.29 kg, while the radius of the pulley is R = 0.616 m. A mass, B, mB = 3.45 kg, is suspended from a rope wrapped around the pulley. Assume that the rope does not slip on the pulley. The system starts from rest. What is the angular acceleration of the pulley in rad/s^2 when the system is released from rest?