Angular Acceleration

Angular acceleration is a measure of the change in angular velocity over time. More simply it is a measure of how quickly, or slowly, an object gains or loses rotational speed. If two skaters are spinning at the same speed, but one skater than comes to a halt more quickly than the other skater, he or she has greater angular acceleration. Average angular acceleration is calculated by subtracting the starting angular velocity from the final angular velocity and dividing by the time between this change in velocity.