Posted by mas on .
A centrifuge rotor rotating at 13,000 rpm is shut off and is eventually brought uniformly to rest by a frictional torque of 1.30 m·N. If the mass of the rotor is 4.80 kg and it can be approximated as a solid cylinder of radius 0.0710 m, through how many revolutions will the rotor turn before coming to rest?

phy 
bobpursley,
calculate the moment of inertia I for a solid cylinder.
Torque= I * alpha
then
displcement= wi*t1/2 alpha*t^2
you are given wi, t, and have calculated alpha