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Homework Help: Oscillating Springs ?

  1. Feb 17, 2010 #1
    1. The problem statement, all variables and given/known data

    I've had some problems trying to work through this problem:

    Two springs of stiffness k1 and k2 are attached in succession to a mass m. What is the frequency of vibrations in terms of the spring stiffness k1 and k2 and the mass m?

    2. Relevant equations

    f=(1/2pi)sqrt(k/m)

    I think that is the only relevant equation, but I am not entirely sure.

    3. The attempt at a solution

    I am confused at weather or not I need to multiply or add the two spring constants. Or, if I need to make two separate equations with the frequencies being constant in both equations.

    I tried to relate it to the energy of a spring, but I didn't have a displacement so that equation would not work.

    Any help would be greatly appreciated, Thanks!:smile:
     
  2. jcsd
  3. Feb 18, 2010 #2

    lanedance

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    Homework Helper

    try 2 dispalcement variables
    the end of the first spring
    the end of the 2nd spring

    write down the force vs distance equation of each spring & so find the expression for the 2 combined by equating the force
     
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