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Finding the mass of a spring

  1. Jun 4, 2015 #1
    We have been given a table listing the extension and 3 times for 20 oscillations without the mass on the spring stated. I have used this to find an average time then /20 to find t for 1 oscillation, then plotted a t2/x(extension) graph. I have inserted a trend line to find y=mx+c = y=3.8001x + 0.0292. We have been told that c = 4pi2mspring/k (k=25 N m-1) rearrange so mspring = ck/4pi2 = 0.01849111601kg

    My questions is where does the c = 4pi2mspring/k come from, I can't find any reference to it at all, I know my answer is right but I would like an understanding of it instead of just writing c = 4pi2mspring/k as if it's fact. Thanks
     
  2. jcsd
  3. Jun 4, 2015 #2

    haruspex

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