- 1L10. Universal Gravitational Constant
- 1L10.10 Cavendish Balance Film Loop Time lapse of the Cavendish experiment.
- 1L10.30 Cavendish Balance Standard Cavendish experiment with lead balls and optical lever detection.
- 1L20. Orbits
- 1L20.10 Gravitational Well A potential well made from a large bicycle rim and Spandex.
- 1L20.17 Orbits in a Hemisphere A ball rolling in a transparent glass hemisphere will precess in a predictable manner.
- 1L20.18 Orbits In Sphere Derivation of the period of a ball orbiting in a spherical cavity.
- 1L20.51 Ellipse Drawing Board The two nail and string method of drawing an ellipse.