(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Find the center of mass of a semi-circular plate of radius r

Find the volume when the plate (above) is rotated around a line along its straight side

2. Relevant equations

2(pi) integral of r dr

3. The attempt at a solution

I honestly don't know how to do centroids. :-( I'd like to know how to actually solve this problem.

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# Homework Help: Find the center of mass of a semi-circular plate

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