KIIIIIIfii=++FHGIKJ=12221611122bgω.Therefore, the fraction lost, KKKifi−diis 22/62110.667./2 3fiiiKI−=−==45. (a) No external torques act on the system consisting of the two wheels, so its total angular momentum is conserved. Let I1be the rotational inertia of the wheel that is originally spinning atibgand I2be the rotational inertia of the wheel that is initially at rest. Then I2ωωbgand
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