Euler's Disk Wobble

The wobble gets faster just before it stops. Ask students to predict what will happen. Spin disk/coin and let it settle. Key idea: Friction removes energy while the geometry of the wobble changes. Ask: Why does the wobble speed up while the disk is losing energy? Safety and cleanup: Use inside a tray away from edges. https://instructional-resources.physics.uiowa.edu/1q6025-eulers-disk-wobbler