The applet on Page 2 shows the motion of a ball performing projectile motion, with or without air resistance.

Detailed information on how the applet functions and two lessons on projectile motion, including a lesson on air resistance, are available under Applet Help on the applet's Help menu. For activities to be carried out with the applet, see A1 to A4 under Related Items.

About the assumptions made about air resistance in the applet and the definition of the drag coefficient, see Assumptions under Applet Help.