Amusement Park Physics - How do physics laws affect amusement park ride design? Design your own roller coaster and experiment with bumper car collisions. Soccer Ball Physics - Discusses shape of a soccer ball, spin effects and the motion of projectiles. Gyroscope - Graphics, related links and a video combine to show you how gyroscopes work. On a General Method of Expressing the Paths of Light and of the Planets, by the Coefficients of a Characteristic Function - An original paper by William Rowan Hamilton, dated 1833. How a Helium Balloon Works - Explanation of lifting capabilities of helium, hydrogen and hot air balloons, from How Stuff Works. Block and Tackle - Colorful illustrated tutorial shows how a block and tackle (as well as levers and gears) works. Simulations with Java - Provides several interactive physics simulations such as springs and masses, pendulums, molecules. Objects, mass, gravity, spring stiffness can be modified. Gravity - Provides definitions of gravity. Kepler's Laws - Article in the Platonic Realms. Gives a novice's overview of Kepler's laws. Classical Mechanics on Wikipedia - Free online encyclopedia with description of the theory and history of classical mechanics. Derivation of Basic Gyroscope Formula - Web page contains a clear, simple and intuitive derivation of this formula. The Eöt-Wash Group - Group at the Center for Experimental Nuclear Physics and Astrophysics, University of Washington, undertaking laboratory tests of gravitational and sub-gravitational physics. Non Linear Mappings - Interactive visualisation of nonlinear mappings, a Java applet simulating the standard map and the Henon map. Mechanics: Statics and Kinematics - Splung.com provides educative material including distance, displacement, velocity, acceleration, linear motion, circular motion, momentum, Newton's laws of motion, simple harmonic motion, energy, work, power, gravitation, Kepler's laws, satellites and friction. Physics Articles - Discussion of various forms of rotating motion in which the Coriolis effect plays a part, such as the Foucault pendulum and inertial oscillations. Illustrated with animations. Oscillations and Harmonic Oscillations - Tutorial on this topic. String Wave Solutions - Provides some solutions for wave equations.