Why identify the Lagrangian as kinetic energy minus potential energy?
18054
Is there a proof from the first principle that the Lagrangian L = T - V?
56266
Potential energy and the work energy theorem
129242
Is temperature a Lagrange multiplier of energy?
112073
What does a Lagrangian of the form $L=m^2\dot x^4 +U(x)\dot x^2 -W(x)$ represent?
3603
Lagrangian and Hamiltonian EOM with dissipative force
1031
When does Hamiltonian equals to energy of the system?
106538
Why are thermodynamic potentials minimised?
121320
Why is there conservation of kinetic energy in elastic collision and not in inelastic collision?
42186
When is the Hamiltonian of a system not equal to its total energy?
46053
How to find Hamiltonian from this simple Lagrangian? (tricky)
36380
Why not use the Lagrangian, instead of the Hamiltonian, in nonrelativistic QM?
66919
When/why does the principle of least action plus boundary conditions not uniquely specify a path?
94615
Is the change in kinetic energy of a particle frame independent?
126142
Action principle, Lagrangian mechanics, Hamiltonian mechanics, and conservation laws when assuming Aristotelian mechanics $F=mv$
97765
Force as gradient of scalar potential energy
122902
Kinetic energy conservation in a collision
114225
If movement is relative, why is it said that moving objects have kinetic energy?