A 40 kg flywheel in the form of a uniform circular disc of 1m radius is
making 120rpm. Calculate the angular momentum. ( moment of inertia of
circular disc about an axis passing through its centre= ½ mr2
)
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To speed up a flywheel from 60rpm to 120 rpm, energy equal to
is requires. Calculate the moment of inertia of flywheel. Also calculate change in angular momentum of flywheel.
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