The pulley and the hanging mass have the same value of mass, m. The system starts from rest and is released. The string exerts a torque of 1/3 mgR about the axis of the pulley, and the angular acceleration of the pulley is (2 g)/(3 R) The string exerts a torque of 2/3 mgR about the axis of the pulley, and the angular acceleration of the pulley is g/(3 R) The string exerts a torque of 1/3 mgR about the axis of the pulley, and the angular acceleration of the pulley is g/(3 R) The string exerts a torque of 2/3 mgR about the axis of the pulley, and the angular acceleration of the pulley is (2 g)/(3 R)