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Homework Help: Rotational Motion- Parallel Axis Theorem?

  1. Jun 16, 2012 #1
    1. The problem statement, all variables and given/known data
    A meter stick is held to a wall by a nail passing through the 60-cm mark. The meter stick is free to swing about this nail, without friction. If the meter stick is released from an initial horizontal position, what angular velocity will it attain when it swings through the vertical position?

    2. Relevant equations
    Parallel Axis theorem Iz=Icm+mr^2
    Conservation of Mechanical Energy E=1/2Iω^2+U=[constant]

    3. The attempt at a solution
    By using the parallel axis theorem, I have found the moment of Inertia, which is 0.09. Now, I am a bit stuck as to how to apply this toward finding the angular velocity. I believe rotational kinetic energy is a necessary intermediary step, but I am unsure about how to get there.

    FYI, I am doing this through an online course and so have myself and a textbook--no teacher. I sincerely appreciate any and all help!
  2. jcsd
  3. Jun 16, 2012 #2


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    How is potential energy determined for the meter stick ?
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