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Homework Help: Help finding Spring Constant

  1. Feb 2, 2010 #1
    Here is the question:

    -When a mass of 26 g is attached to a certain
    spring, it makes 20 complete vibrations in
    3.1 s.
    What is the spring constant of the spring?
    Answer in units of N/m.

    My teacher gave me the formula to find the spring constant
    but i can't seem to get it right!?

    W=Sq Root of k/m

    sq root= square root sign (idk how to do the sign sorry)
  2. jcsd
  3. Feb 2, 2010 #2
    I did a google search, "frequency mass spring constant"

    The first result may help:

  4. Feb 3, 2010 #3
    w is not work .. It is the angular frequency .. So your k = w^2 * m .. You have the mass m and w is given as w = 2*pi*f ,where f is the frequency .. Since you have no. Of cycles 20 at time 3.1 you can easily compute the frequency f and from there computing w and then get your k ..
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