Physics Demonstrations: Fowler's Physics Applets
Michael Fowler, Commonwealth Professor of Physics at the University of Virginia, offers this prime collection of (some still in progress) physics demonstrations. Applets (Java) demonstrate such classic principles as Newton's Cannon (in which the user may fire red cannonballs at different velocities from a tall mountain -- and see which of them will orbit the earth), Group Velocity and Phase Velocity, Two-dimensional Collisions, Projectile Motion, Brownian Motion, and One-dimensional One-atom classical Gas, among others. Inquisitive users may download the applet as a .zip file, as source code, or with related class materials. A series of related applets are listed, as are links to resources such as TIPTOP, The Internet Pilot to Physics.