Initially, a ball has an angular velocity of 5.0 rad/s counterclockwise. Sometime later, after rotating through a total angle of 5.5 radians, the hall has an angular velocity of 1.5 rad/s clockwise. What is the angular acceleration? What is the average angular velocity? How much time did this take? At some point the angular velocity of the ball had to have been zero. At what angle from it's initial orientation did this occur and how long did it take?