II) A cooling fan is turned off when it
is running at 850 rev/min. It turns 1500
revolutions before it comes to a stop. (a)
What was the fan’s angular acceleration, assumed constant? (b) How long did it take the fan to come
to a complete stop?
11.The tires of a car make 65 revolutions as the car reduces its speed uniformly
from 95 km/h to 45 km/h. The tires have a
diameter of 0.80 m. (a) What was the
angular acceleration of the tires? (b)
If the car continues to decelerate at this rate, how much more time is required
for it to stop?
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