This demo illustrates projectile motion. A body is launched with fixed speed and with user-variable launch angle and air resistance proportional to the velocity of the body. The demo animates the resulting trajectory.

The unit of length in this demo is the maximum horizontal distance the projectile can travel with no air resistance present. The unit of time is the time taken for a projectile fired directly upwards with no air resistance to reach its maximum height.

Instructions for use

• Enter the dimensionless damping coefficient (the ratio of initial speed to terminal speed). This coefficient is zero when no air resistance is present.
• Enter the launch angle measured in degrees from the horizontal. The order in which you enter the damping and launch angle doesn't matter.
• Click "Launch".
• Repeat as often as desired. To clear the screen, click "Clear".