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For questions involving the Lagrangian formulation of a dynamical system. Namely, the application of an action principle to a suitably chosen Lagrangian or Lagrangian Density in order to obtain the equations of motion of the system.

6 votes
2 answers
701 views

Contradiction between Lagrangian and Hamiltonian formalism

I am currently studying an introductory course to theoretical physics. I stumbled upon something I can't seem to understand, namely: Suppose that we have a system without any potential energy, and thu …
CedricL's user avatar
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1 vote
1 answer
249 views

Particles connected with spring, sliding over lines. Question about the potential energy

I'm currently studying small oscillations with the Lagrangian formalism. I stumbled upon an exercise that I can't seem to understand the method of solving it. Two particles $P_1$ and $P_2$, with the …
CedricL's user avatar
  • 77