- Pendulum | 0, 0, 1
- Mechanics problems | 0, 17, 4
- Mechanics | 0, 693, 17
- Physics | 276, 25k, 429
- Natural science | 0, 30k, 686
- Science | 0, 36k, 821
- Ciro Santilli's Homepage | 238, 147k, 2k
- Generalized coordinate | 38
- Lagrangian mechanics | 366, 676, 9