Rebound Rumble ballistic trajectory with air friction drag and Magnus Effect (backspin/topspin lift/dive). For students interested in the physics, math, and computer simulation aspects of this problem. Free-body force diagram, derivation of differential equations of motion, and C pseudo-code for trapezoidal numerical integration.
This Java applet provides teams an easy way to calculate height and distance at various points in a trajectory. It includes an accurate representation of air resistance and source code. Enjoy.
To open just the applet, open the classes folder, then the file "projectileMotion.htm"
This is where a tenacious NEM comes in very handy. - Mark McLeod [more] 
