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Math Help - Moment of inertia of a square prism

  1. #1
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    Moment of inertia of a square prism

    EDIT:
    Can some1 help me solve this:

    http://www.freeimagehosting.net/imag...4bbecc8847.png

    Thanks in advance.
    Last edited by shadow85; January 23rd 2011 at 07:26 PM.
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  2. #2
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  3. #3
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    steps involved to working this out would be appreciated, so I can understand how it is done.
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  4. #4
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    OK I have worked out part (a):
    I = integral y^2 . dA
    = integral y^2.a.dy
    = a.integral y^2 .dy from -b/2 to b/2
    =a. [y^3/3] from -b/2 to b/2
    = a.b^2 / 12

    can sum1 confirm this and try continue with part (b). Thanks.
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