AP
Physics Warm-up #17

A pulley is accelerated uniformly from rest at a rate

of 8.0 rad/s^{2}. After
20. s the acceleration stops and

the pulley runs at a constant speed for 2.0 minutes.

Then the pulley uniformly comes to rest after a

further 40. s. Find (a) the angular velocity after the

initial acceleration, (b) the rate of angular acceleration

when returning to rest, and (c) the total number of

revolutions made by the pulley.