A centrifuge rotor rotating at 11000 rpm is shut off and is, Ask an Expert

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A centrifuge rotor rotating at 11000 rpm is shut off and is eventually brought uniformly to rest by a frictional torque of 1.92 m\cdot N. If the mass of the rotor is 6.41 kg and it can be approximated as a solid cylinder of radius 0.0590 m, through how many revolutions will the rotor turn before coming to rest?

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