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Question

A flywheel is rotating about a fixed axis passing through its COM. It has a kinetic energy of 420 Joules when its angular speed is 20 rad/s. The moment of inertia of the wheel about the fixed axis is


A
1.44 kg m2
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B
2.1 kg m2
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C
1.9 kg m2
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D
0.48 kg m2
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