A ceiling fan of moment of inertia 30 kg m' rotates about its own axis at a speed of 120 r.p.m. under the action of an electric motor of power 62.8 watt. If electric power is cut off, how many rotations will it complete before coming to rest?

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A ceiling fan of moment of inertia 30 kg m'
rotates about its own axis at a speed of 120
r.p.m. under the action of an electric motor of
power 62.8 watt. If electric power is cut off,
how many rotations will it complete before
coming to rest?
Transcribed Image Text:A ceiling fan of moment of inertia 30 kg m' rotates about its own axis at a speed of 120 r.p.m. under the action of an electric motor of power 62.8 watt. If electric power is cut off, how many rotations will it complete before coming to rest?
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