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A cooling fan is turned off when it is running at 850 rev/min. It turns 1350 revolutions before it comes to a stop. (a)

A cooling fan is turned off when it is running at 850 rev/min. It turns 1350 revolutions before it comes to a stop. (a) What was the fan's angular acceleration, assumed constant? (b) How long did it take for the fan to come to a complete stop? (c) How many revolutions would it take in 50 s.

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