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Homework Help: Compressin of spring

  1. Nov 18, 2007 #1
    If compression of a spring is doubled, the stored energy increased by a factor of?

    I think that the stored energy is increased by a factor of 2.

  2. jcsd
  3. Nov 18, 2007 #2
    What is the equation for a spring's potential energy?
  4. Nov 19, 2007 #3
    Fs1=1/2 kx^2 so if k = 25 v=4
    = 200

    Fs2= k=50 v=4

    so by factor of 2
  5. Nov 19, 2007 #4
    Ah, you are doubling the wrong thing. k is the spring constant. The question is asking about changing x by a factor of 2.

    [tex]F_{s1} = .5kx^2[/tex]

    [tex]F_{s2} = .5k(2x)^2[/tex]

    [tex]\frac{F_{s2}}{F_{s1}} = ?[/tex]
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