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Calculating an object's moment of inertia

  1. Nov 21, 2004 #1
    What equation(s) is/are used to calculate an object's moment of inertia?
  2. jcsd
  3. Nov 21, 2004 #2


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    I think it's given by the volume integral:

    [tex] I = \iiint_V{\rho(\vec{r})r^2}dV [/tex]


    [itex] \rho(\vec{r}) [/itex] is the density,

    [itex] r [/itex] is the distance from the axis about which the moment of inertia is being calculated.

    I'm not totally sure on that though...
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