If you have a conserved quantity, why can't you use it to eliminate a variable in the Lagrangian?
17414
Lagrangian of an effective potential
110906
Why is work a scalar quantity?
158717
Why do we prefer "Lagrangian and Hamiltonian mechanics " over the newtonian mechanics?
82166
How are constraint forces represented in Lagrangian mechanics?
140986
Can the kinetic energy be a function of the position vector?
40355
Equivalence between Hamiltonian and Lagrangian Mechanics
129242
Is temperature a Lagrange multiplier of energy?
157191
Conjugate Variables, Noether's Theorem and QM
111611
When can we add a total time derivative of $f(q, \dot{q}, t)$ to a Lagrangian?
112783
Is it mathematically valid to separate variables in a differential equation?
67258
Why is a conservative force defined as the negative gradient of a potential?
106538
Why are thermodynamic potentials minimised?
31123
Is angular momentum conserved if you move off at a Tangent?
112209
Landau's argument for dependence of Lagrangian on magnitude of velocity
26896
Why can't $ i\hbar\frac{\partial}{\partial t}$ be considered the Hamiltonian operator?
19783
Why does a system try to minimize potential energy?
91314
Advantages of Lagrangian Mechanics over Newtonian Mechanics