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A Christmas tree ball hangs from a hook in the ceiling.

  1. Apr 1, 2012 #1
    1. The problem statement, all variables and given/known data

    A Christmas tree ball hangs from a hook in the ceiling. If the radius of the ball is 8 cm, find the period of the ball's oscillation as it swings on the hook.

    2. Relevant equations

    T=2pi*√L/g

    3. The attempt at a solution

    I tried pluggin the number and i'm way off the answer. Am i using the right equation?
     
  2. jcsd
  3. Apr 1, 2012 #2

    gneill

    User Avatar

    Staff: Mentor

    A Christmas ball is not a point mass on the end of a string. The system comprises a Physical Pendulum (look it up).
     
  4. Apr 1, 2012 #3
    true true i got it! thanks! it was complicated.
     
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