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Can't get the correct answer

  1. Feb 8, 2015 #1
    1. The problem statement, all variables and given/known data
    wMPXLaE.jpg

    2. Relevant equations


    3. The attempt at a solution
    U18FkPH.jpg
     
  2. jcsd
  3. Feb 8, 2015 #2
    Looks like your using the period for pendulum of length L instead of a harmonic oscillator of spring constant k
     
  4. Feb 8, 2015 #3

    kuruman

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    Gold Member

    Also, you did not use the steady reading of 0.40 kg. This reading is related to the spring constant. (How?)
     
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