Dual Axis Sand Pendulum https://physicsfunshop.com The kinetic energy trades back and forth between swinging toward the support arm and then swinging perpendicular to that path tracing Lissajous figures in the sand. The sand slowly dissipates the energy and the traced figures get smaller so the next one fits inside the last. Coupled oscillations like this can occur when multiple modes of motion (degrees of freedom) are available to the system. ➡️ Follow the link above for information on where to

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Chaotic Double Ring Pendulum: a fun design on the chaotic double pendulum. Interesting and intricate motion arises from a simple assembly of two physical pendulums (one attached to the end of the other) with the kinetic energy of the system moving back and forth between the two rings until friction damps away the energy. Chaotic motion is characterized by extreme sensitivity to initial starting conditions, tiny differences in how the system is released leads to dramatically different outcomes ea