<p>It could be that it’s late and my brain ceased functioning after my daughter woke up for the 3rd time tonight, but if I recall, to find Q you sum up [y bar prime] * [area prime] each section. But then I was thinking, for a circle you just use the [(4r)/(3pi)]<em>[(1/2)pi</em>r^2] of one of the halves. So which is it, do you sum all the sections or just use the “top half?” Would be easier -> [url=<a href=“http://en.wikipedia.org/wiki/List_of_centroids]List”>List of centroids - Wikipedia]List</a> of centroids - Wikipedia, the free encyclopedia<a href=“circular%20segment”>/url</a> rather than do some trickery to get the bottom half.</p>
<p>edit: nvm, I think i’m thinking of if you don’t use the neutral axis. It’s 2:00am, do you know where your centroid is?</p>