Doug is driving a golf ball off the tee. his downswing takes 0.50sec from the top of the swing until ball impact. at the top of the swing, the club's angular velocity is zero; at the instant of ball impact, the club's angular velocity is 30rad/s. the swing moment of inertia of the club about the grip is 0.220kg*m^2. what average torque does doug exert on the golf club during the downswing? a. 13.2 b. 26.4 c. 64.6 d. 106.8