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Author Topic: Spinning coins  (Read 1748 times)


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Spinning coins
« on: September 23, 2014, 07:49:33 PM »

Here is a video of some tricked spinning coins:

Apparently they were invented by Magician Diamond Jim Tyler.
The edge of the coin has been beveled and it seems the coin always lands on the side of the larger rim.
I am not sure if this is due to the rolling motion, to the weight distribution, to the air drag, or a combination.

What I am curious is what would happen if they are flipped in the air. Of course, they may land on either side, but would the probability still be exactly 50/50?
I suspect it may be biased slightly. Perhaps 45/55? 49/51?  49.99/50.01?
If somebody does the experiment I would move this topic to the second board. Perhaps a large model of a coin with wooden discs would show any effect more?   :-\  I have too many projects right now . . .
« Last Edit: September 24, 2014, 01:22:32 PM by ta0 »

the Earl of Whirl

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Re: Spinning coins
« Reply #1 on: September 23, 2014, 08:26:10 PM »

See Daveid!  There is the possibility that threads can work out of the non spin top related section!!!

Maybe I can get some of our youth interested in this spinning coin thing?  Actually, there are more adults who might get into it than youth!
Happiness runs in a circular motion!!!


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Re: Spinning coins
« Reply #2 on: September 24, 2014, 12:19:43 PM »

I'm going to have to try to make some of these...