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Simple pendulum Help. Dunno Why Im wrong.

  1. Apr 27, 2013 #1
    1. The problem statement, all variables and given/known data

    A very light rigid rod with a length of 0.742 m extends straight out from one end of a meter stick. The combination is suspended from a pivot at the upper end of the rod as shown in the following figure. The combination is then pulled out by a small angle and released.
    2. Relevant equations
    Period T=2pi sqrt(L/g)


    3. The attempt at a solution

    T=2pi* sqrt (.743/9.8)=1.72s

    http://www.webassign.net/serpse8/15-p-034-alt.gif
     
    Last edited: Apr 27, 2013
  2. jcsd
  3. Apr 27, 2013 #2

    ehild

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    It is not a simple pendulum, I am afraid. A picture would be useful. You did not take the meter stick into account.

    ehild
     
  4. Apr 27, 2013 #3
    Oh i see its a physical pendulum
     
  5. Apr 27, 2013 #4

    ehild

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    Yes. Find the moment of inertia.

    ehild
     
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