Click on the image to view a QuickTime movie.

A classic illusion that demonstrates that it is the motion of the center of mass of a body that should be attended to.

Doubly tapered cylinders seem to roll up a V-shaped set of rails when the center of mass of the cylinders is uniformly lowering.

This demo can be found in cabinet A on shelf 2 of the UCSD PUL Demo Room (WLH 2015).