Uncategorized
- Math
Traffic woes of the single driver
At moderate traffic volumes, a single car moving at randomly fluctuating speeds can cause traffic jams in its wake.
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In your article, a spinning coin’s motion is explained by the existence of an air cushion between coin and tabletop. If this is indeed the case, then I would expect coins to do something quite different in a vacuum. What do they do? Richard Chambers Charlotte, N.C. H. Keith Moffatt offers an explanation for the […]
- Math
Spinning to a rolling stop
Air viscosity makes the rolling speed of a spinning, tipping coin go up as its energy goes down until the coin suddenly stops.
