A driven air cart between two springs has a magnet on top. Perturbations are introduced by other magnets. Jump effect is shown. Use the small Cenco string vibrator to demonstrate amplitude jumps. A simple bipolar model demonstrates chaos on the overhead projector.
Plots require a digital scope or other equipment.
A simple electronic circuit shows double scroll chaotic behavior on an oscilloscope. A simple program to display computer simulation is also included. The parametric resonance state occurs when the pendulum is driven vertically at twice its frequency. A brief history. On using a self-oscillating pendulum driver to demonstrate parametric amplification.