Magnetic Braking on Aluminum
Magnet motion is noticeably resisted.
Teaching & key ideas
What you do: Slide magnet over/near sheet compared with nonmagnetic object.
What students see: Magnet motion is noticeably resisted.
Why it works: Moving magnetic field induces currents that oppose the motion.
Question to ask: How can aluminum slow a magnet if it isn't magnetic?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: How can aluminum slow a magnet if it isn't magnetic?