- Pendulum | 33, 33, 2
- Mechanics problem | 0, 105, 12
- Mechanics | 14, 2k, 51
- Physics | 276, 46k, 835
- Natural science | 0, 62k, 2k
- Science | 0, 67k, 2k
- Ciro Santilli's Homepage | 262, 222k, 4k
- Generalized coordinate | 89
- Lagrangian mechanics | 907, 2k, 19
- Manifold | 164, 424, 6