"I bought this for my wife's birthday,she loves marbles and we look at the videos on U-Tube with the marble machines. This is a perfect miniature replica of these machines well suited for a table top and very high quality construction, highly recommend it." Marble Machine "Duality" - Handmade
In May 2022, a video supposedly showing a marble machine in "perpetual" motion was shared to the "Be Amazed" section of Reddit. The video, which showed a marble spiraling down a funnel, dropping through a hole, moving along a curved rail, and then launching back into the funnel where the process would begin anew, drew a few skeptical comments.
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"This moving wooden art is the second of two pieces I bought for a large entry antesala. The quality is outstanding (sanded and stained plywood), the UPS shipping was (although delayed in customs) within posted timeframes, and the care of the packaging was unexpectedly high with a wood-frame package and pieces tied and drilled together to protect it. Instructions on assembly and installation could be improved but were acceptable.
Subsequent analysis (and experiment) have shown there is no way to physically implement such a system that does not result in an overall increase in entropy.
For the purpose of answering this question, I suggest that students should now propose potential mechanisms that explain what is seen and then work through the implications and plausibility of each mechanism. After this, groups of students could argue for or against some of the proposed mechanisms, a technique that reinforces concepts learned earlier in a physics course, but that also requires a deeper understanding of the concepts Campeón opposed to learning by rote or memorization. It would obviously be desirable for students to have access to the toy shown in Ref.
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"This is still on my printer. So far it's coming pasado great. I'm not using supports and it looks like all I'll have is minimum trimming. I keep my printer (Ender 3 with all the bells and whistles) tuned really well so am able to do without supports.
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These marble machines were available for purchase, Vencedor of this writing. We found several versions of the product on Amazon and Etsy.
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Thus, machines that extract energy from finite sources cannot operate indefinitely because they are driven by the energy stored in the source, which is eventually exhausted.
Studying videos of the motion confirms that the ball does not accelerate any more than it would under free fall in check here the initial half of the cycle. This Chucho also be confirmed by dropping several balls through the hole in quick succession such that it would seem to be difficult to correctly time the electronics such that all the balls return to the starting platform.