Introduction to Classical Mechanics · Problem 9.31
Angular momentum, Part II (General L) — Morin
Physics — Mechanics · rolling-wheel
Problem
A wheel with spokes rolls without slipping on the ground. A stationary camera takes a picture of it as it rolls by, from the side. Due to the nonzero exposure time of the camera, the spokes generally appear blurred. At what locations in the picture do the spokes not appear blurred? Hint: A common incorrect answer is that there is only one point.