Deriving potential energy

  • Thread starter 71GA
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  • #1
71GA
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Hello, i am trying to derive flexible energy, but i get a negative sign in front of a Work (A). Where did i miss?
F is force of a spring. I don't know if i used Hooke's law correctly...

screenshot.png


Thank you for looking.
 
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Answers and Replies

  • #3
71GA
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Nomrally, potential energy is the negative of the work performed by some force in moving some object from one point to another.

http://en.wikipedia.org/wiki/Potential_energy


I am sorry i miss write... it is about flexible energy :)
 
  • #4
nasu
3,957
582
I think you mean "elastic energy". And the elastic energy is a form of potential energy.
What you calculate is the work done by the elastic force between the points 1 and 2. This is equal to -(U2-U1).
 

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