Example 1: A fun is rotating at 90 rpm.
It is then switched OFF. It stops after 21
revolutions. Calculate the time taken by it
to stop assuming that the frictional torque
is constant .
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a fan is rotating at 90 rpm.It is then switched off. It stops after 21 revolutions. calculate the time taken by the frictional torque is constant .
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Answer:
t=28 sec
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