An electric fan is turned off, and its angular velocity decreases uniformly from 500 rev/min to 200 rev/min in 4.00 s. (a) Find the angular acceleration in rev/s2 and the number of revolutions made by the motor in the 4.00-s interval. (b) How many more seconds are required for the fan to come to rest if the angular acceleration remains constant at the value calculated in part (a)?

Solution 10E Problem (a) Step 1: Initial angular velocity = 500 rev/min or 8.33 rev/s 0 Final angular velocity = 200 rev/min or 3.33 rev/s Time taken t = 4s