Loop with Rotation Arrows (Teaching Aid)

Teaching angular/rotational motion in physics, I was always looking for anything in my office to demonstrate rotation. I created this simple loop with four arrows -- it has been a huge hit with students.

Use it to explain angular/rotational motion, magnetic fields, and induced currents. I designed the loop with two spaces that fit 6x2mm magnets so you can keep the loop ready for use, stuck on your whiteboard. If you don't want to use magnets, I created a 6x2mm puck that makes a nice “point” on the edge of the disk for your demonstrations.

Printed model in PLA, 0.3mm layers with no supports. The 6x2mm puck has a 3mm brim to help with bed adhesion.