Physics, 20.01.2020 19:31 AliceYT

Two disks of identical mass but different radii (r and 2r) are spinning on frictionless bearings at the same angular speed ω0, but in opposite directions. the two disks are brought slowly together. the resulting frictional force between the surfaces eventually brings them to a common angular velocity.

a) what is there final angular speed?
b) what is the change in the rotational kinetic energy?

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Two disks of identical mass but different radii (r and 2r) are spinning on frictionless bearings at...

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