Lenz's Law Demonstration Machine of Science

I built a simple device to demonstrate Lenzs Law. As the aluminium disc swings by the magnet, eddy currents are induced in the aluminium which then produce a magnetic field which opposes the field which caused them. The opposition force causes the aluminium disc to rapidly slow down. Kinetic energy is converted to heat via electrical resistive heating in the aluminium. ... https://www.youtube.com/watch?v=bZl0oOa3rZE