Eddy Current Anti-Gravity
The electromagnetic force: magnets induce electricity, electricity induces magnetic fields.
As the magnet falls through the copper pipe (since magnets won't stick to copper but the copper will carry electricity) it creates an electric field which creates magnetic forces which swirl (eddy) around and slow the magnet down.
This is how a shake up flashlight works (along with a battery h to store the created electricity).
The magnet also tends to not touch the pipe as it goes down. It just slow motion tumbles.
This is the same look that satellites have rolling in orbit.
Here's a (not) perpetual motion machine: a magnet pendulum. Adding more magnets on the top and underside of my glass chair increases the swing time:
With slightly larger rare earth neodymium magnets the time on motion nears half an hour! A smoother, flatter piece of glass decreases the friction and also increases swing time.
