Your link follows to a pretty good set of animations on the topic (linked by the OP of that thread): http://www.animations.physics.unsw.edu.au//jw/rolling.htm

Your link follows to a pretty good set of animations on the topic (linked by the OP of that thread): http://www.animations.physics.unsw.edu.au//jw/rolling.htm http://www.animations.physics.unsw.edu.au//jw/rolling.htm Good stuff, and even has an interesting note about how train wheel rims acually go backwards as the wheel turns!