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Super quick question on spring and energy conservation

  1. Oct 22, 2008 #1
    Super quick question on spring and energy conservation!!

    1. The problem statement, all variables and given/known data
    What does conservation of energy in equation form look like for spring?


    2. Relevant equations

    i know that [delta]K= k-k0
    i know that [delta]Ug=mgh-mgh0

    idk on [delta]Us= .........

    The s,g stand for subscripts
    3. The attempt at a solution
    I thought that Us=1/2Kx^2 but it's not right
     
  2. jcsd
  3. Oct 23, 2008 #2

    alphysicist

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    Homework Helper

    Re: Super quick question on spring and energy conservation!!

    Hi I_LoveCasey!,

    That is the formula for the potential energy of a spring. So if the spring displacement goes from x0 to x, what is the change in the springs potential energy?

    (Do the same kind of thing that you did for the gravitational potential energy--the formula for gravitational potential energy is Ug=mgh, and so the change is the two terms that you have in your post.)
     
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