Anti-gravity experiment shows what Newton could not explain about gravity.

[sentientagent]

eddy currents, not anti gravity. same reason (more or less) things slow down when you drop em into water -> there is a force acting against the force of gravity, resulting in less acceleration. newtonian laws still apply.

[hede88]

Great video guys.. Well the magnetic flux must be inducing an electric field of some kind in the metal as it proceeds through the pipe.. Ive seen this in school also. Then the induced field probably attracts the magnet behind it.. So in a way it converts the gravitational pull into an opposite pointing vector on the magnet or maybe the gravitational force is locally disabled by the magnetic fields.. Try and see if you can make it go faster or slower through by "hammering" it down or holding back

[PrestoWind]

@hede88 thank you very much

[vmoananu]

Great video.

[PrestoWind]

@vmoananu Thank you very much

[hotchicksandpuppies]

I wish I saw more good videos like this, with a happy family doing something together and really interesting also.

[PrestoWind]

@hotchicksandpuppies Thank you for the kind words

[MandalayWind]

Cute kids. Yes eddy currents cause opposing magnetic field

[PrestoWind]

@MandalayWind Thanks Man.

[DadHav]

Wind. Let me be the first to try for an explanation. First of all the kids are great. I think if you do some research you will find this has no relationship to gravity. There is something known as a Paramagnetic Anomaly. What is really happening is the magnet moving close to copper or even aluminum creates eddy currents which slow the magnet down. I'm sure someone else smarter than I will explain better.

John

[PrestoWind]

@DadHav Yes you could be right. I need to do more research on the subject. Thanks for the comment.

[DadHav]

@PrestoWind

Yes, I'm sure you'll find the pipe is like a one turn coil that is short circuited. So as the magnet passes through it generates a potential that creates a magnetic field. If this is the case Lenz's law would come into effect but the bottom line might be the magnetic Field generated is opposite polarity of the magnet. So hence the drag. It would probably be felt if you attached a string to the magnet and pulled it up through the tube.

John

[KyleCarrington]

@PrestoWind That's exactly what happens, it induces a current into the copper, and that copper produces it's own magnetic field, which opposes the travel of the neodymium. Definitely a cool effect. If this effect DID NOT occur, there would be no cogging in PMA's, it's all the same thing. (As I understand it, anyway).

[PrestoWind]

@KyleCarrington thank you Kyle

[magikahn]

@KyleCarrington Yeah, you are right! If the magnet is not moving relative to the pipe, then it would not induce a current, and thus a magnetic field. But since the magnet is moving, it is inducing a current in the pipe, which results in a counter magnetic field in the pipe, which is attractive to the magnet. This creates drag, or friction thru magnetic attraction.