An electric fan is turned off and its angular velocity, Physics

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An electric fan is turned off and its angular velocity

An electric fan is turned off, and its angular velocity decreases uniformly from 540 rev/min to 240rev/min in a time interval of length 3.65s

A) Find the angular acceleration in rev/s^2.

B) Find the number of revolutions made by the motor in the time interval of length 3.65s

C) 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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Physics: An electric fan is turned off and its angular velocity

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Physics: An electric fan is turned off and its angular velocity

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