15.9 m/s (counter clockwise motion) over 0.27 s and then releases the ball. Assume angular acceleration is constant throughout the motion, and the pitcher's arm is 0.56 meters long. 9) Calculate the instantaneous angular velocity of the pitcher's arm at the start of the acceleration (in rad/s). 10) Calculate the instantaneous angular velocity of the pitcher's arm at release (in rad/s). 11) Assume the answers to Q9 and Q10 are -3 rad/s and +30 rad/s, respectively. Calculate the average angular acceleration of the pitcher's arm over this interval (in rad/sz ). 12) Assume the answer to Q11 is 120 rad/s2. Calculate the tangential acceleration of the ball at the instant of release (in m/52). 13) Calculate the centripetal acceleration of the ball at the instant of release (in m/$). Use the values given in the original problem to solve