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Homework Help: Moment of inertia of a music triangle

  1. Oct 2, 2011 #1
    Moment of inertia of a "music triangle"

    1. The problem statement, all variables and given/known data

    Find the moment of inertia about an axis thru the centre of mass, perpendicular to the plane of an equilateral triangle consisting of identical rods of length 'l' and mass 'm' connected at their ends.

    2. Relevant equations

    Classical mechanics, maybe centre of inertia theorem (or whatever its called)

    3. The attempt at a solution

    not sure, is it possible to "approximate" the three rods as three point masses?
  2. jcsd
  3. Oct 2, 2011 #2


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    Re: Moment of inertia of a "music triangle"

    No. Not for a moment of inertia problem.

    Use the parallel axis theorem.
  4. Oct 2, 2011 #3
    Re: Moment of inertia of a "music triangle"

    Is moment of interia similar to moments of mass?
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