Does the principle of stationary action always work?
40340
How general is the Lagrangian quantization approach to field theory?
40211
Type of stationary point in Hamilton's principle
114901
In what sense is the proper/effective action $\Gamma[\phi_c]$ a quantum-corrected classical action $S[\phi]$?
91310
Does a limit point always exist?
52102
Do electrostatic fields really obey "action at a distance"?
13644
Is the change in the Lagrangian always a total derivative for symmetry transformations of the action?
115328
Properly discontinuous action: equivalent definitions
68284
Is the law of conservation of energy still valid?
12818
In calculating work done by a constant force over a constant distance, why doesn't the subject's initial velocity matter?
61964
Is the principle of least action a boundary value or initial condition problem?
68906
Do the same equations of motion imply the same Lagrangians?
1615
Do the laws of physics evolve?
69138
Is Newton's third law always correct?
55612
Does Newton's 3rd law of motion apply when a person is standing still on a ground?
62964
Relativity: stationary vs moving
24478
What is the name of this theorem, and are there any caveats?
101527
Why is it that a force is not required for a body to move at constant velocity?