| The pendulum model can be used to learn a couple of important concepts in classical mechanics, 
such as gravitational acceleration, energy conservation, and so on. | 
|   
 The above image is just an animated gif file. Click the above button or 
this link to launch the real interactive model.
 | 
|   
 The above image is just an animated gif file. Click the above button or 
this link to launch the real interactive model.
 | 
| System requirements:
You must have Java Version 5 or higher in order to run this program. Please 
go to java.com to get the latest Java software,
if you are not sure. | 
| Failed?
Check out the FAQ for troubleshooting. |