This animation shows a swinging pendulum.
The pendulum swings back and forth.
The program recognizes the following commands:
| S | Stop. Pauses animation. Press any key to resume animation. |
| N | Normal. The normal component of the acceleration is drawn on the screen. Press N again to toggle this feature off. |
| T | Tangential. The tangential component of the acceleration is drawn on the screen. Press T again to toggle this feature off. |
| A | Acceleration. The total acceleration vector is drawn on the screen. Press A again to toggle this feature off. |
| U | Up. The animation pauses when the pendulum reaches the top of its swing towards the left. Press any key to resume animation. |
| D | Down. The animation pauses when the pendulum reaches the bottom of its swing. Press any key to resume animation. |
| Q | Quit program. |
| ? | Help. These commands are listed. |