Work to Compress Spring

  1. 1. The problem statement, all variables and given/known data
    A spring, with a spring constant of 87 N/m, was compressed a distance of 8.6cm (0.086m). How much work was done in order to compress the spring?


    2. Relevant equations
    WC=1/2kd^2


    3. The attempt at a solution
    I tried to plug in the numbers as follows in the above equation - but I can't get the answer out. I have been doing this for ages am like a broken record - pse snap me out of this programming!

    WC= 2*87*.086^2 = 1.286904J
    Apparently, the correct answer is .32J

    Help!
     
  2. jcsd
  3. you are off by a factor of 4
    you multiplied by 2
    maybe you were supposed to multiply by 1/2
     
  4. thanks - I tried to recalculate it this is not the case.
     
  5. Redbelly98

    Redbelly98 12,029
    Staff Emeritus
    Science Advisor
    Homework Helper

    According to this equation, you are supposed to multiply kd2 by 1/2, not by 2.
     
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