- #26
Fredrik
Staff Emeritus
Science Advisor
Gold Member
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Probably yes. I can't think of any other reason.
There are two different questions.I'm just trying to justify to myself a bit more what the lagrangian is, why it's a function of both coordinates and velocities (I assume that to be able to fully specify the dynamics of the system at each instant in the time interval considered, one needs to know the positions of all the particles and the rate of change of those positions at that point?!)