Electric Fields
Notes and animations from Physics 2000

Thinkquest
Gravitational and Electric fields comparison

How Cavendish measured G
(the Universal Constant of Gravity)

Satellite Orbits
Try to put your satellite in orbit round the Earth

Electric Field Animations

View field lines or equipotentials for a selection of charge arrangements here or field lines and the motion of a small charge for simple charge arrangements  here.

Newton's cannon on a mountain

Project a cannon from a mountain top.

Read more about Newton's ideas here

Kepler's Laws

Work through animations to explain Kepler's Laws

Weight and Gravity
Calculate your weight on different Planets

Gold leaf Electroscope
Video clip
 

Gravitation quiz

Gravitational Fields PPT
An overview

Electric fields PPT
An overview

Gravitation
Includes an amusing animation of the Leaning Tower of Pisa Experiment