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Homework Help: Kinetic Energy and SHM

  1. Sep 14, 2011 #1
    1. The problem statement, all variables and given/known data

    I have a graph of position x plotted vs time t of an 18g object oscillating in SHM at the end of a spring.

    How can I find the objects maximum kinetic energy from that?

    3. The attempt at a solution

    It seems like i need to find the value of the spring constant k, but im not sure how i would do that or even if thats correct. Thanks for the help
  2. jcsd
  3. Sep 14, 2011 #2


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    If you have x vs. time, then you have the period of the oscillation. How does the period depend on k and m for a spring?

    The kinetic energy will be at a maximum when the elastic potential energy is at a minimum (since total energy is conserved). This occurs at minimum spring displacement.
  4. Sep 14, 2011 #3
    got it. Thanks
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