Chaos and the Double Pendulum A chaotic system is one in which infinitesimal differences in the starting conditions lead to drastically different results as the system evolves. Summarized by mathematician Edward Lorenz, ”Chaos [is] when the present determines the future, but the approximate present does not approximately determine the future.” There’s an important distinction to make between a chaotic system and a random system. Given the starting conditions, a chaotic ...

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Hey, I found this really awesome Etsy listing at https://www.etsy.com/listing/168992163/call-of-the-ancientmay-the-thread-never

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I ended up using 2 bearings in each hole. The bearings allowed more angular variation than I would have liked. Putting 2 bearings on and supporting it at 2 places seemed to do the trick. The bearings I used were McMaster-Carr part number 57155K365, app. $5 each. Some of the double pendulum building guides use skateboard bearings because of their low cost – on ebay for under $1 each. They are metric, usually with a 22mm OD and 8mm ID. That causes me two problems. First, my 3/8” rod is…

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For homework Steve has to write a mathematical equation that shows the motion of this...or something, not sure I really understand how that can be done

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