Sorry that should say "...on non-ice surfaces...". Harry
On Thu., Dec. 26, 2019, 6:34 p.m. H LV, <[email protected]> wrote: > What we think of as the beginning of modern physics in the 1600s , i.e. > classical mechanics, was informed by the study of projectiles, collisions, > rolling and rocking bodies. A conceptual and mathematical framework was > devised which explained such motions. It was also thought that if all > motions could be broken down into a combination of such motions then > classical mechanics would apply to the movements of all bodies no matter > their size , speed, density or temperature. Of course, as we all know > classical mechanics breaksdown when one moves from the world of immediate > sensory experience to more exotic and extreme environments such as the very > small or very fast. > > However, there is an everyday phenomena which which has proven difficult > to explain in terms of these classical movements. > > https://youtu.be/3kpZ_EWL1wA > > While the proposed explanations probably all influence the curl of a > curling stone, I believe curling requires a new vocabulary of motion. > I have found that it is possible to get metallic cylinders on on-ice > surfaces to curl in the same manner as a curling stone as long as the > cylinders do not complete more than about a 1/4 revolution over the > distance they slide. Since this behaviour is evidently not unique to the > material circumstances of the game of curling I would like to suggest that > classical mechanics is incomplete even in the everyday realm. > > Harry > > > >> >>
