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May 28th, 2016
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  1. Moment of Inertia = 1/2 m * r^2
  2.  
  3. x = r * theta
  4.  
  5. equate rotational energy of disk to energy stored in spring :
  6.  
  7. w^2 = kx^2 / I
  8.  
  9. 2k/M * theta^2 = w^2
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