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Quick question to wat this equation is?

  1. Feb 5, 2010 #1
    I dont understand what U is?
    Is It to do with hookes law?
    Is it to do with kinetic energy?

  2. jcsd
  3. Feb 5, 2010 #2


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    It is energy stored in a spring, with spring constant "k", compressed or extended by an amount "x" from it's equilibrium length.
  4. Feb 5, 2010 #3
    U usually refers to potential energy (or some particular form of it).
    Indeed, this equation is somewhat linked to Hooke's Law; it gives the elastic potential energy stored in a spring when the spring has been compressed or extended by a distance x. k, in this case, is the spring constant of the spring.
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