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Homework Help: Inertia and Center of Mass?

  1. Mar 27, 2004 #1
    Inertia and Center of Mass??

    I'm a bit confused about finding the moments of Inertia for objects, I know


    but what exactly is D, is it the distance from the Center of Mass to the pivot point, can someone please explain this to me??? :confused:
  2. jcsd
  3. Mar 27, 2004 #2

    Doc Al

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    Staff: Mentor

    Parallel Axis Theorem

    D is the distance from the center of mass to the desired axis of rotation. That equation is the parallel axis theorem. It tells you how to find the rotational inertia about any axis if you know the rotation inertia about a parallel axis going through the center of mass.
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