Virtual Laboratory at the University of Oregon Department of Physics and Astronomy.

http://jersey.uoregon.edu/vlab/Cannon/

This simulator allows you to fire cannonball projectiles, varying their launch parameters, air resistance and gravity, and observing resulting trajectories.

Based on "The Art of Renaissance Science: Galileo and Perspective," a videotape by Joseph W. Dauben, CUNY Graduate Center and Lehman College. The program designer was Gary Welz, John Jay College, City University of New York. The videotape is distributed by theScience Television Company which provided the materials to McMurry University.

http://www.mcm.acu.edu/academic/galileo/ars /arshtml/mathofmotion2.html

Examines Galileo's experiments with the inclined plane on a table, which were used to study projectile motion. Galileo correctly reasoned that projectile was subject to two independent motions, and these combine to provide a parabolic curve.