Neodymium Magnet against gravity

[OMGItsJousis]

So, in theory, you could use this, it continues to roll forward, then it goes up through a series of magnets, rolls back over from gravity, repeats. INFINITE ENERGYLESS MOTION!

[chr0n1cl3]

Low budget test, so u need a low budget camera..

[arvindbd]

240p, we meet yet again!

[uberrrich]

where does the energy come from to slow it's movement!? i'm amazed!

[RyuDarragh]

Lovely demonstration of the Lenz effect.

[skatethehouse999]

use this to jump from great heights

[theodoroscristou]

if u had done that 2000 years ago and had told them i am the son of god they would have believed u

[smeethers]

@theodoroscristou "hey is that the son of god or somethin? that shiny thing went slower and slower each time. "

[supercube123]

@theodoroscristou it be witchcraft!

[canecky]

@theodoroscristou and then they would crucify you :)

[Canadiankiid93]

Gravity : 1 , Neodymium Magnet : 0 .

[ShadowKNighT788]

Question for you: Will .... It .... Blend?

[pyrea17]

@ShadowKNighT788 is it a good idea to microwave this?

[ShadowKNighT788]

@pyrea17

lol your microwave will explode just putting it there LOL

[pyrea17]

@ShadowKNighT788 oh really? Have you ever tried it? lol

[SewSolo]

@ShadowKNighT788 /watch?v=Ax2BOCoVDJk

[ShadowKNighT788]

@SewSolo

lol magnet dust!

[upperlupus1617]

I like they're lab coats :D

[NullusxVotum]

does it still accelerate? or is its velocity constant?

[gilbondfac]

@NullusxVotum yes it's constant

[nRADRUS]

@NullusxVotum no. it's like paratrooper.

[gibbo1112]

@NullusxVotum because the faster it get the more force it makes to stop it getting faster, so it finds an equilibrium

[LordKilljoy1]

@NullusxVotum Gravity accelerates...velocity is constant....Velocity and acceleration are two different things.

[NullusxVotum]

@LordKilljoy1 Cholo, acceleration is a change in velocity, as in not constant. so my question is does it still accelerate due to gravity like any old object being rolled down a ramp or does the introduction of a magnet cause the effects of gravity to be negated and it simply rolls at a constant velocity? ya dig?

[LordKilljoy1]

@NullusxVotum Yeah, I see what you are saying. It would still acelerate from the force of gravity, because if the magnet was strong enough to counter the 9.80 m/(s^2) of acceleration then it would stay in the same spot. But it does not stay in the same spot, it just decreses the acceleration of gravity. I hope this helped.

[NullusxVotum]

@LordKilljoy1 This is true, for some reason I thought he gave the magnet an initial push.

[Angelus225]

@NullusxVotum everything has a constant velocity after its overcome friction for a time.

[wneq]

crazy french

[randommagnum]

The mechanical resistance you see here is evidence of Lenz's law, stating that electromagnetic circuits must always obey Newton's third law. This illustrates very well why it takes the sufficient mechanical energy that it does to generate electricity.

[zBraDX101z]

o your da coolest lol

[kdc43]

Fake. I replicated this using a sticky material on the track and it slowed it down. I proved that magnetism does not slow it down. There's no such thing as "mythical eddy currents". There's no need to resort to some fantastic notions.

[evtom]

@kdc43 no its actually the electricity caused by the friction of the magnet on the rail that causes an electromagnet with the rail

[Linkizcool]

@evtom

Hey, not exactly the "friction". The magnet induces an electric current in the pipe (the eddy current), which in turn produces a slightly weaker magnetic field that opposes the magnetic field of the neodymium. Since the magnetic field opposes the neodymium, it slows it down. It's called Lenz's Law, check it out if you want. Its pretty neat, and has a lot of practical applications (motors, generators etc.)

[evtom]

@Linkizcool yes but what do you think produces that weaker magnetic field. its the electricity caused by the friction. its doesn't just apears like magic

[Linkizcool]

@evtom

Nope, its not friction nor does it appear like magic. It's very similar to what happens in an electric generator. Magnets spin around wire (or vice versa), which creates a current in the wire. That's how electricity is produced. All electric currents produce magnetic fields; that was discovered in 1819 by Hans Oersted. Just think of the aluminum tube as a thick wire, it works under the same concept.

[Linkizcool]

@evtom

@evtom

If you really want to get into the details of WHY electricity and magnetic fields are related, you need to study Maxwell's equations and the relevant bits of quantum mechanics. Both these topics are far too broad for discussion on youtube :P

[Linkizcool]

@kdc43

Eddy currents are something you learn in high school physics. You can prove that they exist simply by placing two ends of a volt meter on the pipe, and seeing that there is indeed a voltage produced. If you look on some high school physics site you can see the formulas for magnetic induction.

Also, saying you put sticky stuff on a pipe and rolled something down it does absolutely nothing to refute magnetism. Its like saying rain isn't water because pure alcohol makes you wet as well.

[ppeck84]

@Linkizcool correct me if i'm wrong here but... by placing a voltmeter on the pipe to "see if a voltage is produced" in order to, i'm assuming, magnitize the pipe and provide electromagnitism to slow or counter the magnets decent... I would assume that a voltmeter would show 0 volts (thats not to say some kind of current or voltage is induced) but from what i've learned, and used about voltmeters placing the leads on any 2 points of 1 piece of metal would be same as shorting the leads, thus 0V

[sorova]

@ppeck84 There would be a small voltage. It is a linear induction generator.

[cervantesphantom]

Well Done Gilles! I did this experiment using magnets hacked from a bad pc hard drive disk and a L shaped aluminium profile (like the ones used for curtain support or shower poles). It's always amazing to see how slow the magnet falls! This is on of the most impressive classroom experiments. @+

[vlaf9]

nice les physiciens avec les sarreaux pour faire rouler des aimants XD haha on aime ca.

[LackOfTolerance]

The camera man really loves his magnets innit

[kusanagi1982]

i dont think its going against the gravity .. hes sliding it on a metal thing with walls on both sides .. for sure its gona stick to them and slow down but then the gravity has to pull it and i guess its weight is too much to be stopped dead in it tracks by the magnets power. Just saying .. i aint no scientist but :P

[jonest6151]

@kusanagi1982 not really. The aluminium is not magnetic which means the magnet won't stick to the sides. It is slowed down because of eddy currents in the rail which produce a magnetic field which will work to slow the magnet down. Try looking up faraday's law :)

[12science21]

@kusanagi1982 It's not anything with friction or "sticking," it has to do with the relationship between electricity and magnetism. The electrical resistance of the aluminum creates magnetic resistance that slows the magnet's fall.

[QwukeStudioz]

@12science21 CORRECT!

[ajantred]

Lol, i remember learning about this in physics. It "defies" gravity because the moving magnetic field from the magnet induces "eddy currents" in the aluminium, but in order to induce the currents, its own kinetic energy has to be converted to electromagnetic energy (according to Lenz's law of conservation of energy in electromagnetic induction).

[acexprt]

liar

[supressorgrid]

If that aluminium track was say a quarter mile long, i figure the magnet would build up quite a bit of heat.All that power gotta go somewhere.

[AkumaADemoncus]

I don't know much about neodymium magnets but what would happen if a neodymium magnet had a circle big enough in the middle for it to slide down a wooden pole that is at least 40 meters high, would a neodymium magnet at the bottom have enough strength to repel the magnet before they come in contact or would the force of gravity be enough for them to collide for a split second.

[maximAK47]

it all depends.

[allrightenergy]

All magnets have pulling strengths, which is also the same as the repelling strength. For instance I have some that have a 95 pound pulling strength. Now, if an object would free-fall it would increase in speed. Thus, the higher you go the more force you create from the gravity formula. If that force is above 95 pounds then "yes" it would smack and shatter the magnets. Be careful - Do not do it.

[AkumaADemoncus]

yes it would be extremely dangerous the shrapnel could impale me and could cause serious injures if the magnets shattered of course

[TheLinus100]

lol

[FieryBob]

Lol people, aluminum is not magnetic, but here's a brief explanation why it slows down..

The aluminum reflects it's own magnetism and repels itself. If it was steel/iron, then the magnet would stick and not even slide the slightest bit.

It's not nickel, or steel, or another magnet, it's aluminum. This also works with copper and other non-magnetic metals.

[skok65]

@FieryBob Thanks. I was wondering about that.

[tigerfur11]

why dont they try doing it on a wooden pole??

[buhaybaboy]

Because they think your an idiot

[spaceJamesyehaw]

you're obviously american.

get the fuck off the internet.

[tigerfur11]

Clearly you have the brains of a rocking horse

and im not American im actually from Europe

[smeethers]

@tigerfur11 a rocking horse has no brain at all. duh. and if you reply" exactly" then youre retarded, because every living animal needs a brain to function.

[estrm]

Matrix

[the44playboy44]

and ...

[penguindude77]

lolz thats what i was inkin

[93394348]

thats so easy to explain...

[lestersole]

What is it with you people with numbers as your account name.. >.>

[93394348]

myob..i got no idea on how to change the name...u know how?

[xxmtgxx]

Probably there birth year..

[Fomelogo]

so... explain it

[93394348]

so hard to explain using words...ill explain in a video...

[Fomelogo]

awesome!! i'll be expecting it :D (meaning I'll subscribe i guess)

[shariar1995]

its a magnet , magnet sticks to the steel and so it falls slowly

[biero1987]

its aluminium magnets dont stick to aluminium

[shariar1995]

how do u know its not nickel, could be just nickel

[jvcrules]

also works if u put a neo down a copper tube. i found out on accident. confused the shit out of me

[jonnyasprin]

cool,make really big ones so people can ride em down the side of a sky scraper

[StrongerMagnets]

Nice - the long aluminum rail illustrates the Eddy current principle in a very visual way..

[david102994]

@StrongerMagnets how are eddy currents involved in this?

[Jimmy7524]

... Pourquoi ?

Il y a t-il une raison ?

[WexMajor82]

I know!

They eat slugs!

They throw headbutts!

[hellkid94]

omg since google took over youtube, there is no impertance for utube its just fucking commercials

[BertNinja]

Its not magnetism , its another force but ive forgot the name of it.

its used in lots of braking systems ( the important ones than )

[xxxpornstarfreakxxx]

IN German language, we say its a "Wirbelstrom" . Cause of the Rotation of the Magnetic field, there are some other magnetic fields in the Aluminium. The gravitation between the 2 fields slows down the magnets..

[mundzielo]

See you it on Discovery in "Smash Lab" ?

[BertNinja]

Yes i saw it in smash lab

[WarzSchoolchild]

EDDY CURRENT BRAKING.

[Dragiux]

Lol Advanced Physics 101

[KKinsane2009]

wait a minute, why is neodynium magnetised to the aluminium and not the, iron? magnet?? especially if aluminum isn't magnetic, thats really odd. is there some special property in neodymium? electrical?

[godwhatafatty]

there is a magnetic flux going through the magnet into the aluminum. this flux fights movement. neodymium magnets are just stronger and create a bigger flux. There's actually an electric current being created in the aluminum!!! (according to maxwell's equations) AP Physics C ^_^

[dumle29]

the first thing is just a aluminum ring roling down the second is a neodymium ring.

aluminium isnt magnetic but it becomes magnetic when a strong magnet pases by the quicker it pases by the more magnetic the aluminium gets

[xxxpornstarfreakxxx]

It would work with normal magnets,too. Read my comment ;)

[mk0frosty]

on a aluminum rail you first try a normal magnet and then try a neodymium magnet.

Great :O... now instead of magnets try with a copper piece...it will fall slower than normal magnet ;)

[hellstudios]

that beam looks aluminum, isn't aluminum non-magnetic?

[Dingo1336]

thats stainless steel i guess

[kamzok]

hes speaking french... and all he really said was this is aluminium its not magnetic blah blah and the neodymium fell very slowly..

[blahdob]

Wow i'd hate to be on the rollercoaster using the first one

[copercoller]

this is america not mexico

[Joonasyes]

Internet is America?

[PzoiNick]

gosh he must be a troll

[oldnotweak]

@Joonasyes freedom? check. capitalism? check. holy hell it is!

[coolmagicdude]

why would you even say that? who was speaking in spanish in the first place? plus internet isnt america like joonasyes pointed out, and america isnt only the USA

[marcusoreo22]

sorry american, english isnt the only language in the world

[Jimmy7524]

pwn

[spiritass]

what's behind that door with a laser sticker? What are you/the professor working on?

[sebairaf3]

current trought aluminium, just energy loss...

[marcops3fan]

lot lot bigger tho

[AvatarIroh]

aleady being used for trains and elevators

[eddypikachu]

Lenz Law it's a conductor with a magnetic field passing through it. It will oppose any magnetic motion. Due to conversion to heat through conductivity resistance, the magnetic is allowed to move, albeit slowly. The spinning is only due to the magnet being round and contacting the surface. You can do the same thing with a tube and a magnet. It will never actually touch the tube but fall slowly through it.

[onthecuttingedge2005]

try a carbon tube.

[geradhensley]

try no tube >.> if it goes against gravity :O

[onthecuttingedge2005]

Lenz Law

[dominatus84]

It looks like something you don't need a labcoat for.

Why do some pseudo professors show so much childsplay things? Is it to inspire?

[adrifromhh]

i think it could be used to slow down vehicles like for example an elevator...

[bitzky77]

Anybody know the dimensions of the magnets in this experiment?

[walikai]

eddy currents pwn

[durian789]

Get a thick tube brass, drop in any magnets and it will fall very slowly through. The thicker the brass, the slower it gets through. Same principle here with this video.

[VCat2006]

So it only sticks a little to aluminium, or does the spinning do something special?

[Fentanyl3]

Lenz Law it's a conductor with a magnetic field passing through it. It will oppose any magnetic motion. Due to conversion to heat through conductivity resistance, the magnetic is allowed to move, albeit slowly. The spinning is only due to the magnet being round and contacting the surface. You can do the same thing with a tube and a magnet. It will never actually touch the tube but fall slowly through it.

[knutkleven]

short.. its induction xD

[NerdPuppet]

Exactly... Yawn.

[nachoranda]

i want a neodymium magnet =(

[Clawsfury]

you can get one or two from an old hard drive, but their not round

[kawana87]

really? where are they located??

[Clawsfury]

they are located at the base of the actuator arm (the little arm that spins on the platters/disk)

There aren't a lot of noticeable parts in a hdd except these so once you open one you'll know exactly where the magnets are located :)

If your having problems you can google for "hard drive magnet"

[FunkyBass]

kjmagnets . com

[Dubaifreak]

wow this is the futureeeee

[azizandamir]

mais ou ce que on peut avoir ca ?

[scilonthreat]

You see this in triple beam balance scales. At the far end of the armature there is a thin magnet suspended between two conductive plates. It acts as a breaking system to slow down the oscillation of the scale.

[Clawsfury]

True, they use the same system to rapidly stop rollercoasters :)

[scilonthreat]

cool

[kawana87]

stop saying smart things.. my brain feels......bad..

[BouncingBarnicle]

You need to get a new brain then...

[kawana87]

lol perhaps.. but new brains are so expensive!! I can only afford the ones on sale.. the ones damaged by excessive marijuana useage :D

[zimtower]

Absolute zero should be possible to reach but it would only occur in a few atoms and would also take a large amount of energy to draw the energy out of the atoms. There is no substance in existance that is at 0k and getting a substance to 0k would have to be done using something like the Peltier effect.

[Yodas777]

Sorry Jkherriot.

You are right. But if you read between the lines you'll understand :

About the 0k temperature.... We all know that it is a theorical temperature. one that can never be reach on earth.

I only mention that so that we could cool down as much as possible TOWARD 0 k ... by using liquid nitrogen .... That we know will never get the alluminium colder than 67K. (that is the theory) if the Alluminium gets as cold as 100k during the test it would be good.

[Yodas777]

It's all a question of electric current generated in your aluminium rail. Better the conductor the slower the magnet will fall. Cool down the rail to 0deg Kelvin (liquid nitrogen) Test it... Take Copper instead of Aluminium... Take GOLD instead of Aluminium... The Best conductor The better response you'll have! Good Job guys!

[gilbondfac]

thanks for your comments ! it's true !

[Yodas777]

How would you calculate the actual work done by the Magnet in this test. The magnet work it's way against gravity. Gravity = 9,8m/ss now what is the acceleration of the magnet? I have some similar tests I'll post it.

Cheers

[gilbondfac]

sorry i've not calculate it?

[wolfekeeper]

More or less just force x distance. The force is the weight of the magnet, and the distance is the fall.

You also have to allow for the speed the magnet has at the bottom, which it didn't have at the top and subtract off the kinetic energy. But the speed is easily estimated.

[jonest6151]

@Yodas777 could you just measure the time taken and use one of the equations of motion to calculate the deceleration due to eddy currents?

[itchy5544]

@Yodas777 Thanks for being a complete dumbass. First off liquid nitrogen isn't anywhere close to 0K. Second, Copper is a better conductor than gold, with silver being even more conductive than both.

[tremer88]

its videos like these that trip me out

[MisterBazooka]

lenz's law in action

[BrokeMoFo]

It's caused by eddy currents of the magnetic field reacting with the aluminum track.

[gilbondfac]

eddy current! is american therme but the real therme is Foucault current (french physician)

[Treblethink]

Lenz's law?

[TheReasonWhyGuy]

magnet VS gravity

Gravity won!

[edos2034]

Laplace force.

[paintball227]

That is very wierd i know ppl do this kind of stuff with copper pipes because it moves slow down it but this is cool to

[jeremyrunion]

ok the faster it rotated the slower it fell. hmm excelerate the spin to make it cancle out gravity

[dsalpha]

could be better if this is in english

[csaba641]

with a copper rail it would be more amazing but it's very cool anyway

[PostTheMissing]

Why would it be less amazing?

Aluminum, and Copper are booth diamagnetic...

[AlienRelics]

That is not why it works. If it were diamagnetic effects at work, I'd expect it to just jump out or fall at normal speed.

When a magnetic field cuts across a conductor, it induces a current in such a direction that the current induces a magnetic field opposite the original field. So as the magnet falls, the moving field creates a reverse field in the aluminum that repels it, slowing the magnet's fall.

[scilonthreat]

Gosh darn forces attempting to reach equilibrium! No matter what we do we can never get that infinite energy source. lol

[mrquanta]

can't you read, idiot?

[gilbondfac]

READ THE TEXT!!

Eddy courent in aluminium rail

and neodymium magnet VS gravity!

freinage par courant de foucault.

[EETechs]

Umm, electromagnetic braking systems work the same way. Rather than do experiments that are already in use, why not invent a plasma pulse jet engine or a plasma shield that can stop bullets. Then you have the fame you've been looking for...

[mrquanta]

that is about the electric field of the inclined plane. the magnetic field of the magnet is interacting with the electric field of the plane although it's diamagnetic.

[Aldaraia666]

Dia what?!

[mohan2]

triangle magnet