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Homework Help: Work involving a spring

  1. Nov 11, 2007 #1
    1. The problem statement, all variables and given/known data

    A spring with a spring constant f 15 N/cm has a cage attached to one end.
    a) How much work does the spring force do on the cage when the spring is stretched from its relaxed length by 7.6 mm?
    b) How much additional work is done by the spring force when the spring is stretched by additional 7.6 mm?

    I converted the 7.6 mm to .76 cm but I aint sure on the question for this. Is it W - 1/s x 15 x .76 ?
  2. jcsd
  3. Nov 11, 2007 #2
    use W=0.5KX^2 to find the work done..
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