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Homework Help: Torsoin pendulum with meter stick

  1. Feb 10, 2010 #1
    1. The problem statement, all variables and given/known data

    A meter stick is hung at its center from a thin wire. It is twisted and oscillates with a period of 6.0 s. The meter stick is sawed off to a length of 70.0 cm. This piece is again balanced at its center and set in oscillation.

    2. Relevant equations

    T = 2PI / (omega) = 2PI * (sqrt(I/k)) where I = m.o.i and k =torsion constant

    3. The attempt at a solution

    I managed to get the value for the two period

    T = T_0 * sqrt (I / I_0) where T_0 and I_0 are the initial parameters. The problem is the question does not state the I and I_0. I tried considering it to be a thin rod but failed. The correct answer is 3.5s.
     

    Attached Files:

  2. jcsd
  3. Feb 10, 2010 #2
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