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## Homework Statement

http://docs.google.com/Doc?id=d277r7r_60c2235gfg [Broken]

## Homework Equations

[tex]

M(Rcm)=\int(rdm)

[/tex]

## The Attempt at a Solution

Okay, so I've figured out that I have to integrate the radii by the mass element dm, which in this case would be p, because that's the mass/unit area? I think that's right, but even there I'm not sure and the actual integral itself I have no idea how to do for such a weird shape.

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