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March 5, 2012


can you explain how metronomes sync-up when on a rolling surface :: click below to watch the phenom ::

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Comments (4)

I have no idea, but this seems like a valid explaination.

Posted by: Lomky at March 5, 2012 6:34 PM

Conservation of Angular momentum.

Posted by: Chuck Henager at March 6, 2012 1:50 AM

You might find this interesting: http://www.mate.tue.nl/mate/pdfs/11722.pdf

Posted by: mike at March 6, 2012 4:00 AM

Harmonic constructive interference. The metronomes send forces into the board counter to the pendulum swings - every action has an equal and opposite reaction. The sum of all 5 of these forces begins random, but peaks develop whenever most of the pendulums are pushing in the same direction. In that case, the board is pushed farther to one side than the other, which nudges the out-of-sync metronomes towards sync. The effect gets stronger as they line up, until at the end the board is actually moving slightly back and forth, counter to the pendulums (you can even see this effect).

Posted by: Joe Marfice at March 16, 2012 3:55 PM

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