Question

A flywheel is attached to an engine to keep its rotational speed between 100 rad/s and 110 rad/s. If the energy fluctuation in the flywheel between these two speeds is 1.05 kJ then the moment of inertia of the flywheel is _______ kg.m² (round off to 2 decimal places).

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Answer :

Correct answer is : 1

ω1 = 110 rad/sec, ω2 = 100 rad/sec, ΔKE = 1.05 kJ = 1050 J

1050 =  1 2 × I f × ( 110 2 100 2 )

I f = 1 k g . m 2

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