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An electric fan is turned off and its angular velocity decreases uniformly from 500 rev...

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An electric fan is turned off and its angular velocity decreases uniformly from 500 rev min to 20 rev min in 4 seconds a Find the angular acceleration in rev sec b the number of revolutions mad by the motor in the 4 00 seconds interval c How many more seconds are required for the fan to com to rest if the angular acceleration remains constant at the value calculated in part a and b

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