rubber band between two points of the plane car with thread-and-rubber-band chains over pulleys, supporting dominoes; observable tensions in rubber bands; lots of variations possible, e.g., give tensions in a couple of systems then infer tensions in a couple of others, based on chain lengths explain circular model, pc2 inclines by vectors etc. *@
rubber band between two points of the plane car with thread-and-rubber-band chains over pulleys, supporting dominoes; observable tensions in rubber bands; lots of variations possible, e.g., give tensions in a couple of systems then infer tensions in a couple of others, based on chain lengths explain circular model, pc2 inclines by vectors etc. *@