Model of various pitches...
The Pitch Simulator applet will let you experiment with different velocity, angles, rotations per minute (rpm), and pitches and see how they appear either from the side or from the top. After pressing the start button below, enter values for velocity, horizontal angle, vertical angle, and rpm, and select the desired pitch and view. Then press start/restart to watch the ball take flight. The horizontal angle is the angle in the horizontal axis and vertical angle is angle along the vertical axis. So if you enter -5 for the vertical angle, the ball will be thrown down 5 degrees. Press start/restart again to try again. You can press the pause/resume button at any time in the flight to stop the ball. If the display should become garbled or you wish to clear the previous paths, simply press the clear button. Press quit at any time to close the window.
Here are some of the things you should observe: