Phys 21 Rotational Inertia and Torque

What is the angular velocity of the merry-go-round and the rabbit? Example: A disk with a moment of inertia I1 is rotating with angular velocity (1 about a frictionless shaft. It drops onto another disk with moment of inertia I2 initially at rest. Because of surface friction, the two disks eventually attain a common angular velocity. What is it? ................
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