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Homework Help: Find work from additional spring compression

  1. Mar 6, 2013 #1
    The spring used has a spring constant of k= 35000 N/m.
    a) how much work must you do to compress this spring by 0.10 m from its relaxed condition.
    U=1/2*k*x^2
    .5*35000*(0.1)^2=175 J (correct)

    b)how much work must you do to compress the spring an additional 0.10 m?
    I tried the same equation but with x=0.2 but it doesnt work. (U=700J)
     
  2. jcsd
  3. Mar 6, 2013 #2

    Doc Al

    User Avatar

    Staff: Mentor

    I assume they want how much additional work you must do.
     
  4. Mar 6, 2013 #3
    Ohhh
    I subtracted 700-175 and its correct , Thanks!
     
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