Final answer:
The angular acceleration is 1.0 rad/s².
Step-by-step explanation:
Angular velocity is defined as the change in angle per unit time. In this case, the angular velocity changes from 3 rad/s clockwise to 8 rad/s clockwise in 5 s.
The angular acceleration can be found by dividing the change in angular velocity by the time taken:
Angular acceleration = (Change in angular velocity) / (Time) = (8 rad/s - 3 rad/s) / (5 s)
Angular acceleration = 1.0 rad/s²