Posted by **Unknown** on Tuesday, May 10, 2011 at 7:57pm.

A turntable with a moment of inertia of 0.029 kg*m^2 rotates feely at 2.8 rad/s. A circular disk of mass 270 g and diameter 20 cm, and initially not rotating, slips down a spindle and lands on the turntable.

a) Find the new angular speed.

b) What is the change in kinetic energy?

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