Principle Demonstrated: Lenz’s Law
Don’t let the magnet hit a bare table. They will chip. Put a fluffy towel on the table top.
This is a simple magic trick. It works every time because of physics. See the video below to see how to present the trick. I do this at the beginning of the unit on magnetism. At the end of the unit I ask them how the trick worked.
Newton’s Nightmare magic trick from PenguinMagic.com ($15) http://www.penguinmagic.com/p/841
What it demonstrates:
As the magnet descends through the tube counter magnetic fields are setup. The fields slow the magnet’s descent.