This applet simulates projectile motion. To fire the cannon, click or drag in the black area to establish the angle of the shot, or type an angle in the angle field. Next, choose a muzzle velocity for the shot. Hit Go to fire the cannon. The data of each of your shots will be stored for later reference. To clear all data and all trajectories, hit Reset. You may overwrite a previous simulation by clicking the button next to it. Otherwise, the applet will go through the colors from top to bottom.