Spinning to a Rolling Stop
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|Ivars Peterson (MathTrek)|
|The underlying mathematics of spinning disks. Spin a coin on a tabletop. As it loses energy and tips toward the surface, the coin begins to roll on its rim, wobbling faster and faster. Toward the end, the coin generates a characteristic rattling sound of rapidly increasing frequency until it suddenly stops with a distinctive shudder. Mathematician H. Keith Moffatt has come up with an explanation of why this motion ends so abruptly instead of lingering as the coin keeps on rolling faster...|
|Levels:||High School (9-12), College|
|Resource Types:||Problems/Puzzles, Articles|
|Math Topics:||Fluid Mechanics|
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