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Urgent simple spring problem help!

  1. Mar 18, 2009 #1
    A force of 8.4 N holds an ideal spring with a 31.9 N/m spring constant in compression. How much potential energy is stored in the spring?

    I would think it would be PE =mgh
    to get m you divide the force/g
    but now I am not sure what to do after that.
    Any help would be great!!!
     
  2. jcsd
  3. Mar 18, 2009 #2
    Firstly how is F (the force) related to the extension (or compression) of an ideal spring?
     
  4. Mar 18, 2009 #3

    djeitnstine

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    Gold Member

    you will have to find the compressed displacement by the formula f=-kx
     
  5. Mar 18, 2009 #4
    I'm not sure. My Teacher just through this problem at us without much explanation. We haven't even covered springs. I'll look into your question though I am not sure I fully understand it.
    Thanks!
     
  6. Mar 18, 2009 #5
    OH!! Now I can understand that! Fx= -kx...Thank you I will try and see what I get!
     
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