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An electric fan is turned off, and its angular velocity decreases uniformly from 550 rev/min to...

An electric fan is turned off, and its angular velocity decreases uniformly from 550 rev/min to 180 rev/min in a time interval of length 3.70 s.

1- Find the angular acceleration in rev/s2.

2- Find the number of revolutions made by the motor in the time interval of length 3.70 s.

3- 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?

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