"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 the scenario that we are studying, the time-dependent magnetic field induces an eddy current in the ball, which produces its own magnetic field. Lenz’s law states that the current induced in a circuit due to a changing magnetic field takes a direction that opposes the change in magnetic flux and exerts a force that opposes the motion. This law is somewhat qualitative, but it successfully predicts the direction of an induced current, which is sufficient for our purposes. Another, more concrete way of stating it is that the polarity of the field produced by the eddy current opposes the polarity of the magnetic field that is doing the inducing. This causes the ball to be repelled away from the electromagnet by a magnetic force that accelerates it. The end of the rail is then cleverly designed so that the ball flies off the end and lands back on the starting platform, where the process Gozque repeat itself again indefinitely. The description that I have proposed is confirmed by online descriptions of the product, which describe the toy Figura being a “magnetic induction” perpetual motion simulator.6 A subtler objection to this proposed solution is that the magnitude of the eddy currents depends on the concentration of free electrons in a metal, so that meaningful eddy currents are in reality expected in balls made of copper or aluminum, for example, but not balls made of steel.

"Gorgeous kinetic art wheel. Fast delivery and excellent handcrafting. All my friends,visitors and me are completely fascinated. I just needed to add a small weight on one of the wing and it runs perfectly for at least 16 h.

"I got this for a gift and they were blown away by it! It's 3D printed and is a very simple design on the outside, but watching the marble swirl around and create the patterns is just so mesmerizing. It's fun to mess the pattern up and watch the ball just go back to work.

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"I recently had the pleasure of purchasing a stunning kinetic wall art piece from the talented artist, William. The kinetic wall art itself is a true masterpiece. The interplay of movement and form creates a mesmerizing visual experience, transforming my living space into an enchanting gallery. William provided exceptional customer service. From the moment I inquired about the piece to its safe and timely delivery, he displayed a level of professionalism and attentiveness that exceeded my expectations.

However, the material used for the balls is described in the online product description only Triunfador “metal” rather than stainless steel, whereas the rails are explicitly described Ganador being made of “stainless steel.”6 Finally, I observe that this investigation has been mainly theoretical and that there are a few remaining questions that could be resolved empirically by students with access to the device. The motion of the ball and the way it “jumps” due to Lenz’s law is quite similar to a classic demonstration known Vencedor Thomson’s jumping ring, where an aluminum or copper ring is placed on the end of an electromagnet. When the coil is connected to a direct current generator, the ring briefly jumps upward because of induced currents in the ring. However, if the coil is connected to an alternative current generator, the ring flies upward off the top of the coil in dramatic fashion.8,9 Explaining why an AC current has this effect is not an easy exercise.9 In this study, we have not settled the issue of whether the voltage source of this device is AC and whether this plays a role in the ability of the ball to dramatically “fly” from the rails to the platform, similar to the jumping ring. If instructors are able to purchase the device, it would be an interesting student project to use an oscilloscope to determine if the current in the electromagnet is AC and explain exactly why and how this works in the toy.

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Carefully positioned the track into the cuadrilongo hole in the bottom assembly, noting the rectangle is offset to provide clearance for the track insertion pin.

While it might appear to defy the laws of physics, the trick is that its almohadilla contains a hidden battery and electromagnet that accelerates the steel sphere Vencedor it comes down the ramp.

Link Drop a marble into the top of this tabletop sculpture, and it rolls down a ramp and back into itself endlessly.

A common example is devices powered by ocean currents, whose energy is ultimately derived from the Sun, which itself will eventually burn demodé.