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A hoop (thin walled hollow cylinder) of mass 2.3 kg, radius 0.37 m, is rotating at 6.39 radians/s about the symmetric axis. C

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Answer #1

Rotational kE

KE = 0.5 I w^2 = 0.5* mr^2 * w^2

KE = 0.5* 2.3* 0.37^2* 6.39^2

KE = 6.428 J

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