Solution: A disk is rotating at 150 rpm. Answer the following questions: (a) What angle, in radians, does the disk rotate through in 25 s if the angular speed is constant? (b) If a brake is applied to the disk, and it takes 5 revolutions to stop, what was the angular acceleration applied by the break, in rad/s2?

Problem

A disk is rotating at 150 rpm. Answer the following questions:

(a) What angle, in radians, does the disk rotate through in 25 s if the angular speed is constant?

(b) If a brake is applied to the disk, and it takes 5 revolutions to stop, what was the angular acceleration applied by the break, in rad/s2?