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October 20, 2014

Homework Help: physics

Posted by hriday on Saturday, December 27, 2008 at 11:22am.

A horizontal disc rotating freely about a vertical axis makes 90 revolutions per minute reduces to 60,then find the moment of inertia of the disc?
1. mr2
2. 3/2mr2
3. 2mr2
4. 3mr2

(the last ‘2’in each option should be considered as square, please)

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