Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Is the lagrangian always K.E-PE?

  1. Oct 5, 2008 #1
    Is the lagrangian always K.E-PE?????
    I dont think so???
    so WHAT REALLY is the physical significance of the lagrangian???
    Superficially it appears to be KE-PE,but the lagrangian for a charged particle in a vector potential is 1/2MV.V +qV.A-qW.
    where V=velocity
    A=vector potential
    W=Scalar potential.
    If the hamiltonion for the above lagrangian is calculated it turns out to be 1/2MV.V+qW.
    So what does the term eV.A represent???
    It appears to be the interaction energy.
    But why does it dissapaer in the hamiltonion.
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you help with the solution or looking for help too?
Draft saved Draft deleted



Similar Discussions: Is the lagrangian always K.E-PE?
  1. Momentum and K.E. (Replies: 11)

Loading...