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Classical Mechanics- something bothering me

  1. Dec 8, 2004 #1
    Under what conditions can I "build" a Hamiltonian from a given Lagrangian?
    I'm thinking it might have something to do with the potential, but it's not really clear to me what it is the question is.
  2. jcsd
  3. Dec 8, 2004 #2


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    Any conditions,provided the Lagrangian has the "familiar" form:Kinetic-Potential energy.
    It has no connection with the potential,as long it is coordinate dependent only and does not contain "generalized velocities".

    PS.In the first statement i included the degenerate systems.
  4. Dec 8, 2004 #3
    I think that might be it. Besides, they gave me the kinetical energy, but not the potential, so it's probably it.
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