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Calculating the energy stored in a spring

  1. Jan 12, 2010 #1
    1. Calculate the energy stored in the spring when a forceo f 12N is applied (revision
    a graph is given (force extension graph and when the force is 12N, the extension is 80mm)




    2. f=kx



    3. I do not know how to solve this problem and my exam is tomorrow!!!!
     
  2. jcsd
  3. Jan 12, 2010 #2

    rock.freak667

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    In the graph of F against x, the force should vary linearly. What does the area under the graph give?
     
  4. Jan 12, 2010 #3
    k, the spring constant?
     
  5. Jan 12, 2010 #4

    rock.freak667

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    No, the area under the graph would give the product of a force and a distance, which is what?
     
  6. Jan 12, 2010 #5

    is it Newton Metres?
    I genuinely am unsure on this topic to be honest
     
  7. Jan 12, 2010 #6

    rock.freak667

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    Yes Nm, which is also the same as Joule, which is energy. So what does the area give?
     
  8. Jan 12, 2010 #7
    does it give the energy stored in joules?

    so i have to calculate the area under the graph from 12N downward?
     
  9. Jan 12, 2010 #8

    rock.freak667

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    Yes.
     
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