Torus Marble Track

thingiverse

This is a fantastic toy for demonstrating centripetal acceleration. The torus design effectively keeps the marble from becoming a projectile, unlike a traditional banked track. Moreover, this setup provides an ideal scenario for exploring conservation of energy, with its similarity to orbits, since friction and wind resistance are minimal with the marble. I printed mine using 2 perimeters and 10% infill, applying 3 top and 3 bottom layers. To fit it on my print bed, I had to scale down to 93%.