What is the change in the rotational kinetic energy

Reference no: EM13505163

Two disks of identical mass but different radii (r and 2r) are spinning on frictionless bearings at the same angular speed ?0, 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?

Reference no: EM13505163

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