6.2 Newton's law of gravitation.
Understandings:
  • Newton’s law of gravitation
  • Gravitational field strength
10.1 Describing gravitational fields.
Understandings:
  • Gravitational fields
  • Gravitational potential
  • Field lines
  • Equipotential surfaces
10.2 Gravitational fields at work.
  • Gravitational potential and potential energy
  • Potential gradient
  • Potential difference
  • Escape speed
  • Orbital motion, orbital speed and orbital energy
  • Forces and inverse-square law behaviour

IOP - Newton's Law of Gravitation

From apples to orbits - The gravity story.

Phet - Gravity force lab
Phet - Gravity and orbits
Phet - Build your own Solar System

Kepler's third law simulation and database

How stuff works - gravity

You ku - weightlessness


S-cool - Gravitational potential energy
S-cool - Gravitational potential
S-cool - Equipotential & potential gradient