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Homework Help: Series of springs

  1. Feb 22, 2006 #1
    If two springs, having different spring constants, are in a series (lined up, NOT parrallel): is the Force pulling the spring = (sum of spring constants)*(distance stretched) ?
     
  2. jcsd
  3. Feb 22, 2006 #2
    No, no. If the force apply to the [tex]1^{st}[/tex] spring, the equation will be

    [tex]F=k_1\Delta l_1[/tex]
     
  4. Feb 22, 2006 #3
    so the same force is applied to both springs?
     
  5. Feb 22, 2006 #4
    in other words, if F = kx:
    F=(k1)(x1)
    and
    F=(k2)(x2)

    but not F=(k1+k2)(x1+x2)
     
  6. Feb 22, 2006 #5
    That's right, and the equivalent constant is

    [tex]\frac{1}{k}=\frac{1}{k_1}+\frac{1}{k_2}+...+\frac{1}{k_n}[/tex]
     
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