Hi all,(adsbygoogle = window.adsbygoogle || []).push({});

I've got a question that I'm stuck on.

Three disks are spinning independently on the same axle without friction. Their respective rotational inertias and angular speeds areI,w(clockwise);2I,3w(counterclockwise); and4I,w/2(clockwise). The disks then slide together and stick together, forming one piece with a single angular velocity. What will be the direction and the rate of rotation of the single piece?

Express your answer in terms of one or both of the variables and and appropriate constants. Use a minus sign for clockwise rotation.

I haven't really made progress on this question. My prof is abosolutely useless (it's his first year at my university and most likely his last judging by all of the complaints). So basically I haven't been taught how to approach this problem. I've read the texbook and can't figure out how this problem can be solved.

Not necessarly just looking for the answer to the problem, but how to approach it.

Any help is greatly appreciated.

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# Homework Help: Rotating Discs

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