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suspenc3
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http://img244.imageshack.us/img244/9114/centroidsdq6.th.jpg
The book only briefly covers this section and there is an example with a sphere, but I don't really know how to get started.
Heres what I tried:
I basically cut the upper region up into three rectangles, two of them having negative area:
triangle 1)[tex]A=240(100)=24000mm^2[/tex]
[tex]\bar{y}=250mm[/tex]
Distance traveled by C [tex]2\pi(250)=1571mm[/tex]
Volume = [tex]1571mm(24000mm^2=37704000mm^3[/tex]
And then the same thing was done for the other two rectangles of negative area, and then a total volume was found. From this I found a mass which I think is wrong.
Is this the right approach?
The book only briefly covers this section and there is an example with a sphere, but I don't really know how to get started.
Heres what I tried:
I basically cut the upper region up into three rectangles, two of them having negative area:
triangle 1)[tex]A=240(100)=24000mm^2[/tex]
[tex]\bar{y}=250mm[/tex]
Distance traveled by C [tex]2\pi(250)=1571mm[/tex]
Volume = [tex]1571mm(24000mm^2=37704000mm^3[/tex]
And then the same thing was done for the other two rectangles of negative area, and then a total volume was found. From this I found a mass which I think is wrong.
Is this the right approach?
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