My Math Forum finding the COM of a lamina of constant mass density

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 March 14th, 2010, 03:44 PM #1 Newbie   Joined: Jan 2010 Posts: 13 Thanks: 0 finding the COM of a lamina of constant mass density the region lying underneath the the graph of f(x) = ln x over the interval [1, 2].
 March 15th, 2010, 07:21 AM #2 Newbie   Joined: Mar 2010 Posts: 4 Thanks: 0 Re: finding the COM of a lamina of constant mass density You have $x_C= \frac{\iint_{D}xdxdy}{\iint_{D}dxdy} , \, y_C = \frac{\iint_{D}ydxdy}{\iint_{D}dxdy}$ where $D:$ $1\le x \le 2$ $0\le y \le \ln x$

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