1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

SHM Help

  1. Oct 10, 2013 #1
    SHM Help!!!!

    Using a program called tracker we have got data from a spring holding a 0.5 kg weight. We have the displacement in the x direction (positive x direction being down) and time. The task is to somehow find the spring constant (k) but I cannot for the love of me figure it out. Any help is greatly appreciated and this is urgent!!!!
     
  2. jcsd
  3. Oct 10, 2013 #2

    Mentz114

    User Avatar
    Gold Member

    Set the spring in a spring balance configuration and measure its extension for different weights. The slope of the distance vs weight graph is the spring constant. Units are force/distance.

    See here http://en.wikipedia.org/wiki/Simple_harmonic_motion
     
  4. Oct 10, 2013 #3
    Mentz114, this is a homework question and we don't have access to anymore testing, according to my teacher this is enough information.
     
  5. Oct 10, 2013 #4

    Mentz114

    User Avatar
    Gold Member

    What data do you have ? You need to know the frequency then you can use the formula ##f=(1/2\pi)\sqrt{k/M}##.
     
  6. Oct 10, 2013 #5
    The only data we have is displacement as a function of time!
     
  7. Oct 10, 2013 #6
    Does you displacement look periodic? Find the period.
     
  8. Oct 10, 2013 #7
    Plot a graph of the data, with time as the abscissa and displacement as the ordinate. From this graph, you should be able to visually tell what the period of the oscillation is. Assuming you know the relationship between the period and the frequency, you can then use Mentz114's formula to calculate the spring constant.
     
  9. Oct 10, 2013 #8

    Mentz114

    User Avatar
    Gold Member

    Do a Fourier analysis of the data !
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: SHM Help
  1. Shm help (Replies: 4)

  2. Shm physics help (Replies: 2)

  3. Waves & SHM, HELP (Replies: 2)

  4. Help with SHM (Replies: 0)

Loading...