Deriving Potential Energy Density for Longitudinally Vibrating String
69074
Potential energy of an infinitesimal length of elastic rod
97765
Force as gradient of scalar potential energy
21201
Magnetostatic energy density -- derivation without introducing inductance?
70691
Elastic collision in two dimensions
37424
variational question
40028
Calculating Energy of a Wave
25164
Velocity-Dependent Potential and Helmholtz Identities
6035
Brachistochrone Problem for Inhomogeneous Potential
3201
Landau & Lifshitz's Approach (contour method) on the WKB connection formulas
86767
Using separation of variables to solve the wave equation
4707
Gravitational field intensity inside a hollow sphere
100944
The relationship between the energy and amplitude of a wave? Derivation?
117445
SHM with acceleration at mean position
114562
Boundary conditions for calculus of variations in phase space and under canonical transformations
32113
Tension on a massless string
155492
Exercise on local and global symmetry for a given Lagrangian density
16857
Understanding transverse oscillation in 1 mass, 2 spring systems