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Homework Help: Physical pendulum

  1. Apr 20, 2012 #1
    1. The problem statement, all variables and given/known data
    Two pendulums have the same dimensions (length ) L and total mass (m). Pendulum A is a very small ball swinging at the end of a uniform massless bar. In pendulum B , half the mass is in the ball and half is in the uniform bar.

    A. Find the period of pendulum A for small oscillations.

    B. Find the period of pendulum B for small oscillation

    2. Relevant equations

    3. The attempt at a solution

    For A. I got 2∏√L/g which is correct however i am struggling for B

    What I did was

    Pendulum B I= Ibar + Ibar= 1/3 (m/2)L^2+m/2L^2= 2/3mL^2
  2. jcsd
  3. Apr 21, 2012 #2


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    Hi Mdhiggenz! :smile:

    (try using the X2 button just above the Reply box :wink:)
    Looks ok! :smile:
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