1. Feb 8, 2015 #1

   clapper66

   

   1. The problem statement, all variables and given/known data
   
   
   2. Relevant equations
   
   
   3. The attempt at a solution
   

    

   clapper66, Feb 8, 2015
2. 
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3. Feb 8, 2015 #2

   DelcrossA

   

   Looks like your using the period for pendulum of length L instead of a harmonic oscillator of spring constant k

    

   DelcrossA, Feb 8, 2015
4. Feb 8, 2015 #3

   kuruman

   

   Homework Helper

   Insights Author

   Gold Member

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

    

   kuruman, Feb 8, 2015

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