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Homework Help: Moment of inertia

  1. Nov 21, 2015 #1
    1. The problem statementα, all variables and given/known data

    The moment of inertia of a Rod over an
    Axis XX' passing through the center of mass of the Rod at an angle α is-

    2. Relevant equations
    Moment of Inertia of Rod about the end, I =ML2/3

    3. The attempt at a solution
    Answer of the question is ML2/3sin2α

    I didn't understood how sin2 came because even if we shift OL over the axis XX' then



    Attached Files:

  2. jcsd
  3. Nov 21, 2015 #2

    Doc Al

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    Staff: Mentor

    Hint: Set up an integral.
  4. Nov 21, 2015 #3


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    Science Advisor
    Homework Helper
    Gold Member

    The distance along the axis, OX, does not affect moments about the axis. The distance of interest is from the XX' axis to the points on the rod.
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