A disk rotates with constant angular acceleration. The initial angular speed of the disk is 2rad/s. After the disk rotates through 20 radians, the angular speed is 3rad/s.
a) What is the magnitude of the angular acceleration? rad/s2
b) How much time did it take for the disk to rotate through 20? radians
c) What is the tangential acceleration of a point located at a distance of 3 cm from the center of the disk? m/s2