If the above application does not start, please see "about Java environment".

By downloading extensiblependulum.jar, you can runthe simulator in the local environment.

Let's consider the extensible pendulum as shown in the above figure.

For , the following differential equation holds.

where and k is the stiffness.

This simulator numerically integrates the above differential equation and visualizes its dynamics.

Similarly to the double pendulum simulator, chaos can be observed for some initial conditions and parameters.