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Period Square Graphs

  1. Sep 21, 2008 #1
    I'm doing an experiment on periodic motion using a spring and a mass on the end.

    My teacher wants us to graph T^2 and mass, but i don't understand we don't just graph T.

    I hope someone understands what I mean :smile:
  2. jcsd
  3. Sep 21, 2008 #2


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    Welcome to PF!

    Welcome to PF! :smile:

    I think your teacher means that instead of marking the t-axis 1,2,3,4,5,… at equal intervals, you mark 1,4,9,16,25,… at equal intervals.

    The idea is that if you use an ordinary t-axis, you get a parabola, and you need to find the "parameter" for that parabola, which is tricky … :redface:

    but with a t2-axis, you get a straight line, and all you have to do is to measure the slope of it! :smile:

    (also, your measurements won't be perfect :wink:, and it's much easier to draw a best-fit line that a best-fit parabola!)
  4. Sep 21, 2008 #3
    thank you!
    i understand it now :)
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