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M2 Centres of Mass

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Edit: Nevermind, I solved it. Can someone lock this thread?
(edited 10 years ago)
Original post by ThatPerson
I don't understand how to work out the centre of mass of a uniform plane wire framework if it is a uniform circular arc.

I understand how to use the formula rsinαα\displaystyle \dfrac {rsin\alpha}{\alpha}, but after that I don't know what to do.

I'm stuck on a particular problem in the M2 book, but I want to work it out myself, so can someone give me a general explanation of how to approach the problem?

Thanks.

A centre of mass must lie on any line of symmetry. Think about what rsinαα\displaystyle \dfrac {rsin\alpha}{\alpha} tells you, and you should be fine.

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