TiP 2: Classical Mechanics and Clocks
This is a post of the Time in Physics (TiP) series. Time can be viewed as correlation of motions inside a physical system. With the help of a runner, a clock, and balls on a billiard table we can replace the problematic concept of Newtonian time with something that can exists not only in the world of large objects, but also in the weird quantum world of tiny particles.