The Climbing Magnets Mystery (ft. Steve Mould)

[@omarcorales7116]

My left ear enjoyed the start

[@1978jra]

I was thinking the same.

[@JimCullen]

And the end.

[@hsahz]

My right one didn't

[@aurelia8028]

Yeah me too

[@gertboltenmaizonave2421]

Sounds like the microphone was broken, and the audio was not looked at

[@PaulPaulPaulson]

In my head, I was already constructing a complicated device to spin it with a smaller radius at the top. Then Steve just turns the screwdriver upside down. Now i feel stupid 😁

[@zayk6713]

Paul Paulson haha, same here. I am sure we would have come to that conclusion briefly though lol.

[@keithdurant4570]

Guess I am joining your club...it was obvious...and also wrong!

[@xenonram]

I was thinking the same exact thing. You weren't the only one.

[@danilooliveira6580]

that is a pretty fair explanation, and the most obvious one. specially because it does happen with other things. its damn mindblowing that its actually gravity and not the radius of the spin that makes it move.

[@richardaversa7128]

Occam's Razor, you betray us once more

[@Dodo-rb4zf]

ME "Well that's easy to answer..." Steve "If you turn upside down, it still goes up" ME "Alright... I still a dumb mf"

[@mauritz3912]

Why is this on 2veritasium and not on the main channel? Steve Mould is High quality content!

[@robinsparrow1618]

Exactly, if you want to get people to check out Steve's channel then show this to 4.6 mil people rather than just .5 mil.

[@TheSmith645]

@@robinsparrow1618 5 mil. am i missing something here?

[@robinsparrow1618]

@@TheSmith645 .5 mil half a million 4.6 is bigger than .5

[@TheSmith645]

@@robinsparrow1618 damn i missed the dot before 5

[@robinsparrow1618]

@@TheSmith645 all good

[@kart182]

Marvel: "Avengers Infinity War is the most ambitious crossover event in history" Veritasium: "hold my beer."

[@Hodak55]

Haha wow I thought exactly the same thing when I saw the title XD

[@kart182]

Added Kina we're memers at heart, memers for life

[@SouravSengupta93]

I was literally watching Infinity War videos when I saw this in my Sub.

[@kart182]

No Thank You I disagree. Steve Mould is an amazing science guy on KZbin and this is called a collaboration. For main content, you should watch Veritasium not 2Veritasium. However, I do agree that he doesn't seem to give two shits about his content or scheduling these days, just posts when he wants to

[@Vasharan]

It's like Magneto teaming up with Iron Man.

[@LookingGlassUniverse]

Such an exciting collaboration! And really intuitively explained too- well done ☺️

[@jadeddragoon]

4 seconds into video... "uhm... centrifugal force? How is that not obvious?" 1:00 into the video... "oh... okay... never mind then..." 5:30 "Ooooh! Because gravity! Okay."

[@davidwuhrer6704]

Same. I always thought it was centrifugal force. I am amazed to be wrong about something so simple.

[@JoeyLindsay]

I thought it was Eddy currents (the same thing that happens when you drop a neodymium magnet through a foil tube or copper pipe)

[@gorisenke]

The only think I can think of (haven’t heard their explanation yet) is that magnetic fields have a flow, I think it’s clockwise, that they are acting in. It’s the same reason railguns work, you wind your electromagnets in a way where both magnetic rails have a flow that goes forward towards the tip, and the ammunition is launched that direction. Here, the forces aren’t as extreme, and the magnets don’t have anything to suspend them in open space, so friction stops them from moving, but by spinning it, you’re adding another velocity than just towards the rod, and the magnetic field’s flow makes them roll forward. My thought starts crumbling there though. Dunno if it’s friction that lets it go up, I’m just thinking that the magnets roll and maybe this is why. Edit: well shit I was waaaay off.

[@PeeHooo]

What if the magnets are square?

[@fiftyfat]

I'll test that on monday, I ordered 12mm cubic magnets. If the video is correct, I shouldn't observe the effect !

[@rydaddy2867]

My thoughts exactly. My guess is that the square magnets won't remain "flat", they will reorient to be diamonds, then process up the screwdriver by the same means on the now-angled side. I have 130 square magnets here...I could test it now...but I would have to unpack a bunch of the magnets and that's a PITA. I'll just wait and see what Benjamin has to say Monday. ;)

[@lukaswursthorn581]

Just leaving this here to get reminded once u answer.

[@chanyoonjun]

same here

[@bilel114]

@Benjamin and while you're at it, spin it clockwise and anti-clockwise to check if the created electric field has something to do with it

[@mikerich32]

But in order to be certain this theory is correct, it needs to be tested with different variables. For example, magnets with a square cross section instead of a circle, or a change in relative size in either the metal pole (screwdriver) or the magnets to test the "roll and slip" idea.

[@danieljensen2626]

Isn't it general relativity and quantum mechanics that don't get along? I'm pretty sure QFT and even the Dirac Equation are perfectly happy with special relativity...

[@fiftyfat]

Yeah, at 6:05 he says general relativity, the first time was probably a stick and slip of the tongue ! :P

[@TehMuNjA]

yes qft = qm + sr basically, its gravity thats the problem, im sure steve knows this prob just a hiccup he didnt catch

[@LeoStaley]

As soon as I heard him say that, I hit ctrl+f "special" to see if anybody had commented on it. It's inconsistent with general relativity, but Feynman made special relativity work with quantum mechanics.

[@pmikky6808]

I was wondering that myself!

[@General12th]

Quantum Field Theory (QFT) is the unification of special relativity and quantum mechanics. The real challenge is unifying QFT with _general_ relativity.

[@ClearerThanMud]

Wow! I was expecting this to be a fairly lame video boiling down to the tilt of the screwdriver, but I WTFed when he did it upside-down. The stick-slip explanation is gorgeous and unexpected. This video makes me want a new adjective meaning "seemingly lame at first glance but surprisingly interesting." :)

[@omri9325]

You can demonstrate it by drawing a line with a marker over the magnets and do a short spin to check it it rotated the way you predicted.

[@0dWHOHWb0]

Well, since there's no symmetry and gravity always biases it upwards... And as it moves around the screw driver, gravity is tipping the magnet roll downwards, only the bottom edge makes good contact and the strip rolls around its end. And it'll have a turning radius pointing upwards, since the "inside" of the turn is always pointing up thanks to gravity. Kind of like if you take a core of a toilet paper roll or any other cylinder, stand it up on its end on a flat surface and apply a fake "gravity" to the top, tangential to the flat surface thereby tilting the cylinder... If you then push the cylinder along such that it rolls on the remaining edge, it'll tend to translate on the surface away from the direction "gravity" is pointing in. That was my thought anyway, before you pointed out the noise -- though I still think it would work just as well even if it could not slip.

[@Yaptomizer]

Someone please explain what on earth I just read.

[@manuell3505]

It's still just increasing centrifugal force to the top. The magnets hang to the ground, creating a upward 'track' on the axis.

[@wepranaga]

i miss you derek

[@1schwererziehbar1]

Are you a former lover of his?

[@TheScott10012]

Dirk from Veritablium

[@MrChanw11]

I miss you dalek

[@TheKeule33]

GAYYYYYYYYYY

[@colunizator]

He is at his thirties, he found more perspective things to do. But yes, his videos are ones of the best on youtube.

[@dizzyshmizzy2624]

*Puts it sideways. *Magnet flies to space.

[@w0ttheh3ll]

should've painted the magnets on the sides and made another demo that way.

[@redgrittybrick]

yes, chequermarked magnets and a high speed camera ought to be able to verify this

[@eroraf8637]

As soon as he mentioned the pressure at the contact points, my brain lit up like a solar flare.

[@DerUnbekannte]

what a fantastically calming way of speaking

[@pauljmorton]

Now if only there were prizes of millions of dollars for people who solve mini mysteries.

[@WoyablePitt]

FFS I rly thought my headset was broken or smth bcause of the start, you scared the shit out of me, I just bought it a few weeks ago

[@eruditootidure2611]

My headset IS broken, so I couldn't even hear him lmao

[@bennylofgren3208]

WoyablePitt Your keyboard seems broken though, there are letters missing in some of the words...

[@Nevir202]

You think that’s bad? I was listening on my phone, I thought it had blown the speaker or something... -_-

[@ExplodedFrog12]

WoyablePit

[@BearWithWings]

I think he should of tried to prove his hypothesis by using square magnets

[@gorillaau]

I would be curious to see if the same affect is observed with a length of all-thread rod.

[@unvergebeneid]

Yep, Steve Mould definitely deserves more subscribers!

[@Ahkronn]

Now we need someone in the ISS to do this experiment. Logic tells the magnets will just spin around. Probably will move up or down depending on little "vertical" movements if done by hand, since it's rather impossible to keep all axis fixed when done by a human hand.

[@humanbeing_]

So for some reason the right channel/side has no audio for your voice during the introduction... Just FYI. Updated: @ 6:17 it's the same. Apparently either your mic was/is 'jacked' (pun intended) or maybe just some slight technical difficulties.... Again - Just wanted you to know, because I'm certain your going to get other comments on this the more the video is watched.

[@simonvetter2420]

It's a mono mic, he recorded or imported it as stereo, so just the left channel got a signal. Happens quite a lot somehow. You'd think people would watch their videos before uploading them...

[@TheAkashicTraveller]

There is actually some sound on the right channel it's just really quiet. Also yeah, this keeps happening and it's quite annoying.

[@frillneckedlizard8529]

I am actually watching with one broaken earphone so in the part where derek is talking there is almost no audio, there is definately some audio though like Jack Evans said

[@alb9022]

Yeah, but it was still really quiet... had to turn the volume all the way up to be able to hear him on the right side.

[@markjones6358]

Throughout the video, everything I came up with a counter point he almost immediately explained it to my satisfaction. Cool video, thank you. It's always a good day when I can learn something new.

[@peterdneptune]

To prove this theory about gravity's role in this mystery, we should recreate it on the International Space Station where the impact of gravity is minimal. Reminds me of the feather and hammer experiment on the moon...

[@jonathantamm9202]

You could just hold the screwdriver horizontal so their is no top or bottom quicker and cheaper.

[@akshat9282]

I love Steve so much. He explains everything so nicely and elegantly that even a 5 year old would understand after a while.

[@MrCyanGaming]

when I started watching this video, I was like, "It's so obvious", but then you turned it upside down .-.

[@andelainfilms]

Hi all, I'm the OliReading who first came across this strange phenomenon - that's my tweet to Steve Mould you can see 30 seconds into the video. Very pleased it's stimulated so much discussion here, and quite pleased that the solution Steve gives is not a very obvious one! Take a look at my twitter feed @OliReading, and also check out some of my neat magnet art at instagram.com/oligettingcrafty/

[@MrJjasson]

My first guess was what he said we thought was happening, once he he showed us that it wasn’t the way he was turning the screwdriver, I thought that the magnet could be spinning , and it just roles up the screwdriver but I had no idea why. Great explanation. But why wouldn’t the magnet rotate the other way around the pressure point, resulting in it becoming on the upper side of the magnet, and make go down?

[@fiftyfat]

The momentum of the magnet and the fact that the lowest point of contact is always under the center of gravity of the magnet creates a torque thatwill make it rise, which ever way is up !

[@MrJjasson]

Benjamin Herisson oh right, thanks for the explanation.

[@pasijutaulietuviuesas9174]

Jason Karim If this were a problem of just geometry, then yes. But I don't know it would fit in 6 seconds with all the forces and points of contact taken into account.

[@andymcl92]

It's a shorter route for the magnet to rotate up than down. Plus, rotating down would mean the magnet would temporarily go further away from the pole, and it doesn't want to do that.

[@rich1051414]

Eddy currents are also in play in, enforcing the direction of rotation, as the opposite way would fight the eddy currents generating from the rod rotation. You can halt the magnets from pirouetting around the pole, yet the magnets will still rise :)

[@JaapvanderVelde]

Almost wrecked my headphones trying to correct the missing audio channel on Derek, but then Steve came one. Thanks Steve!

[@eharry4]

why didn't he prove his explanation by using square magnets ??

[@kronk358]

Steve is really awesome. He has the most easy to understand explanations Ive seen.

[@GinoGiotto]

So if we do the same experiment on the ISS (where there is no gravity) magnets don't "climb" on the stick. Correct?

[@jetison333]

Gino Giotto they should not, no,

[@daftbence]

Just a correction, there is gravity on ISS, but it's just constantly falling as it revolves around earth. It's a microgravity environment.

[@DEADB33F]

...or just hold the screwdriver sideways.

[@nimmen]

Stick-slip. The horrible phenomenon that also causes squeaky hinges, screeching forks on plates, high pitched squealing brakes, stuck drawers and stuck sliding windows.

[@Celastrous]

Suddenly very aware of Derek's mortality. Looks like he's aged 15 years since his last upload

[@spacepirate9882]

because it was 15 years ago

[@pjox]

You should have posted this to your main channel. This is a very simple yet very well done video. You could've given Steve far more visibility like that!

[@Fotosinteze69]

To prove your theory, I think you should make same experiment with rectangular cuboid magnet.

[@davelangford2439]

Steve Mould has the best science channel on KZbin. I love the way he explains things

[@nicstroud]

Steve could have proved this hypothesis by spinning the magnets around a horizontal screwdriver. The result being they move in neither direction.

[@macswanton9622]

if the screwdriver stayed level, it shouldn't move at all

[@supergoober1021]

That strobe effect shot made me wonder... if, rather than spinning the magnets around the pole, you spin the pole and either prevent - or allow - the magnets to spin with it, would they still climb? Great explanation, by the way! I’ve also visited and subscribed to Steve Mould’s channel and now I know I’m not going to get anything done today!!

[@jusore]

Now build one space elevator using that :3

[@brendarua01]

Yes!

[@magicandmagik]

lmao genius

[@justindie7543]

I like the idea, but how would you get down? Also, wouldn't it take a ridiculous amount of energy to spin something that massive?

[@azdgariarada]

Horrible idea. "yeah, let's introduce a destabilizing oscillation effect into a 35,000 km orbital tether" What could go wrong?

[@justindie7543]

azdgariarada What are you talking about? Spinning the tether would make it *more* stable, in fact that's how some of the first satellites were launched. en.wikipedia.org/wiki/Spin-stabilisation

[@ianptbo]

So it wouldn't work if it was oiled? Or if the magnet was curved the same shape as the rod?

[@jonathantamm9202]

Just tried with spherical magnets and they go down.

[@wvvwkx]

To be played at 1.25x

[@skazzie6022]

wwwKx 1.5x

[@RiccardoBello98]

Saved my day

[@SagaraUrz]

Thank you

[@1schwererziehbar1]

Those are rookie numbers.

[@Necessarius]

Too perfect with 1.25x

[@al35mm]

Really like Steve Mould's videos. Been following him for a while. Well worth a sub!

[@the_ALchannel]

S T I C C AND S L I P P

[@funny36ful]

This was discovered by someone who was bored and spun magnets on a screw driver randomly. What a world we live in

[@noahway13]

So many great discoveries were by accident.

[@funny36ful]

JustKeith I agree!

[@jonathantamm9202]

Just like watching a log roll down a hill and inventing the wheel.

[@BastienDurel]

I have no sound at all when you're speaking

[@scribblargh]

Do you only have a left speaker?

[@BastienDurel]

I do, but it may be broken ^^

[@BastienDurel]

Yes, but it was off (the balance was set to "all right") for an unknown reason ^^

[@alueshen]

That's funny, this video helped you troubleshoot your pesky speaker issues. V2 FTW

[@sizzlinsj8135]

Bastien Durel I think left

[@flurgy22]

Welp, now we need to send a stack of magnets and a screwdriver to the international space station.

[@supreetsahu1964]

Lenz's law, change of flux in metal screwdriver hence eddy current in screwdriver which in turn oppose magnetic field of neodymium magnets, causing them to rise.

[@pluransart1795]

If what you say is true, it should move downwards if the screw driver is supn the other way

[@timber7715]

This can‘t be the reason, because if your argumentation would be true it wouldn‘t rise up in the experiment where he holds the ruler against the magnets. In that experiment there is no change of flux.

[@koyadharmik3287]

Even when there's a scale relative motion existed between magnet and screwdriver. As the point of contact keeps changing there is still a possibility of formation of eddy current. Might be wrong, but it's just a thought.

[@Queenside_Rook]

Gravity MUST play a part, or the chirality of spin and orientation of the screwdriver would matter Instead, we see the magnets always traveling against the force of gravity

[@dhruvnehate6615]

Lenz's law states that the emf is induced in such a way, so as to neutralize its cause. According to this if we are rotating clockwise Lenz's law should make rotate counterclockwise. It has nothing to do with up and down.

[@sebastianterrazas9658]

I really think that the real answer has to do with electric/magnetic fields. I heard that when you spin one, it creates another, or something of that style, so the magnet would feel attracted by the top

[@SteveFrenchWoodNStuff]

Before hearing the explanation, my guess is that it's because of the greater momentum/centrifugal force being at the top, where the swing is the largest. It's being pulled toward the greater force.

[@SteveFrenchWoodNStuff]

But after watching, the rotation and slipping of the magnets does appear to be the best explanation. Now, will square magnets exhibit the same climbing action? I suspect they would. And maybe do to my original hypothesis. Maybe.

[@JustForComments666]

Your initial (not original) hypothesis was the one he explained at the beginning of the video and which he quickly showed was false by turning the screwdriver upside down. Did you and the people who liked your comments even watch the video?

[@FantasmaNaranja]

i mean, i haven't really seen the video yet but from what he's shown so far im reminded of when i used to do that using a pencil and a ruler and watch it rise from the bottom and go flying off

[@StuartPrice2]

Oliver Reichenbach If like me they all thought the transition to the second video was going to be the explanation, and were told to make a guess before the explination, then why would you accuse them of not watching the whole video?

[@louiswouters71]

Square magnets wont work, but they should straighten themselves when starting at a 45 degree angle (and slightly rise in the process) according to this explanation

[@MrTeaboar]

Steves videos almost always amaze me. This was another great one. Thanks for sharing it with us! :)

[@feynstein1004]

Hmm haven't we all tried this with a pencil and some kind of ring when we were little? But I guess putting magnets into anything will make it cooler.

[@samrat6882]

Exactly my thoughts! Spinning a ring around a pencil makes it rise up too.

[@guillaumec1636]

nope it just makes it go away from your hand. If you try spinning it upsite down, it'll just fall

[@whuzzzup]

Except those two things have nothing do do with each other and do not even show the same effect.

[@bluustreak6578]

Very good explanation! I first thought it was the thing he disproved at the very beginning. Basic centripetal force if I'm not mistaking. Really nice to have my intuition broken and then rebuilt in a better way :)

[@russelltalker]

I feel like with the right 3D animation this could've been explained in about 6 seconds instead of six minutes.

[@chanyoonjun]

but it will take 60 minutes to make instead of 6 minutes XD

[@russelltalker]

chan yoon jun lol

[@MaksiZockt]

but with already over 14k views you would save more collective time. save 5 minutes 14k times by once spending 50 minutes more would have been a good trade off

[@Yous0147]

Yeah but I prefer this hands on explanation

[@DukeBG]

More like 600 minutes to make, not 60.

[@samadcharania6568]

If it was the slip and push making the magnets go up, why does it still go up when it wasn't rotating around the screwdriver (when he put a ruler on the side)?

[@BigJohn4516]

Fantastic explanation and visual demonstration.

[@tehjamerz]

I could not manage for the life of me to watch this at normal playback speed

[@Freelancer1001]

That was a very good explanation, having those models really made it clear what was going on. Great video!

[@DataBroth]

another cool example of how audio can be used to help solve physics problems. We can hear faster than we can see and there are many problems worth examining with sound along side visuals

[@saqibmudabbar]

I’ve been subscribed to Steve Mould for about 18months or so I guess and I love his channel as much as I love yours. Nice to see you supporting other youtubers. But you haven’t replied to my email and it’s been like 2years or so. No problem though. I’ll keep waiting, you must be really busy.

[@beaconofwierd1883]

A very cool "easter egg" if you will in this video is that you preformed an experiment pointing towards your hypothesis about the phenomena without even mentioning it. You claimed the slipping was what caused the phenomena, meaning this hypothesis predicts that if no slipping occurs the magnets won't move up, and when you put it on a drill and spunn it it did indeed stay in place :)

[@JimFortune]

I got the idea that the weight was bearing more on the bottom than the top, but didn't know where to go from there. Good video.

[@paaaaaaaaq]

I want to see Tadashi Tokieda solve this problem. He has always the coolest ways to really show and solve the solution.

[@EnderMcCloud]

Once he started talking about how it slips, I just started thinking that the magnets were spinning up it, as well. It's handy sometimes to have a natural understanding of how things work. Oh, and I hope you get more rest, Derek. You looked like you hadn't been getting much sleep or were sick when recording this. Best of luck.

[@francescamele8077]

"PIVOT! PIVOT! PIVOT!! PIVOOOTT!!!" Great video :D

[@vinceb8041]

I recommend 1.25 speed for easier viewing :) great video! It's satisfying to get such a nice explanation for a beautiful little phenomenon like that.

[@FirstLast-fr4hb]

Love the giant props 😅

[@AnimilesYT]

I've been subscribed ever since he uploaded the gravity waves video. his content is amazing :D

[@buriedghostlady]

What a great video! Very interactive, he was answering my questions rhight after i was aking them.

[@JDeWittDIY]

Some tests that can be done: * Try with square magnets * Draw a line on the stack of magnets with marker and film in slow motion to see if it's rotating. * Go on that weightless plane ride with parabolic dives and test it there * File a deep groove in the magnet that touches the screwdriver so that it has two contact points and no slip * Attach a piece of string from the outer end of the magnet stack to the tip of the screwdriver to counteract or even overcome the force of gravity (that would be pretty hard to get just right * Hold the screwdriver horizontal (parallel to the ground) and spin it

[@SIMKINETICS]

Steve's explanation seems cogent. This would be a great problem for Physics students, especially M.E. majors, to either confirm or provide an alternative with actual testing with measurements, data collection & analysis to support either hypothesis. This physics (mechanics) problem is very nuanced, but roughly comparable to an existing mechanism called a 'helical roller lead screw assembly'. The mechanical couple that Steve describes as having skip-slip dynamics means that the sound is a clue to the average frequency of that repetitive action; engineers call that 'creep'. This type of creep results from rollers making contact with each other along a path angled from the tangent of contact, requiring tiny periodic twists. In this experiment, the path of rolling contact would likely be a smooth helix around the screwdriver shaft, but with the helical pitch changing as the twirling speed changes, and/or magnets are added or subtracted. Students would be required to model this problem to accommodate all the significant variables well enough to make predictions. Since this is weird, and has little prior art, it's not a problem that students could simply look up on the Internet for solutions. Physics instructors and professors could have fun with this one!

[@magnusbruce4051]

Well the explanation is far simpler than what I had imagined. I was thinking of something long the lines of electromagnetic induction (moving magnet + wire = current, current + changing magnet field = force, although thinking about that now it'd probably cancel itself out).

[@daviddavids2884]

this topic should be revisited. a WAY to observe whether the magnets are also 'rotating' is NEEDED. cheers

[@Server0750]

It's so easy to explain, that I can't explain it to be understood by you. Outward momentum is bigger at the top because the movement you make is like a cone that's bigger at the top and smaller at the bottom.

[@icantfinkofname]

It'll be interesting to see them do this experiment on the ISS

[@jonathantamm9202]

You could just hold the screwdriver horizontal so their is no top or bottom quicker and cheaper.

[@kanva4]

Wow wow wow... Excellent explanation. My mind was blown away. THIS is called a scientific study

[@Elipus22]

My theory right away, 16 seconds in. The metal rod, when spinning, has a slight angle, meaning the inertia from spinning acts like it would on a cone, causing it to not be perpendicular to the surface of the cone, allowing for a torque to push it upwards. Okay, so you're implying I was wrong now. Seeing your experiments, I'm satisfied with being wrong. I'd suggest putting a bright yellow line down one side, getting access to a slow motion camera, and using a stationary pole for rotation. This would be a good test for your theory.

[@Hans-jc1ju]

Yay, the explanation I set up in the original twitter thread was correct!

[@burkeysvids]

My theories of it being something centrifugal went to bits at @1:30. So now I've paused it for a thought, and my brain went to 'maybe eddy currents'. Calling that now before I watch the rest! Ok, I was way off XD

[@rd9831]

Wonder why the hula hoop on my sexy neighbors body goes up the faster she twists, whereas the hoop falls down immediately when i try the same . The answer is, she has highly magnetic personality, just like the neodymium magnets in your video. She attracts all the vermin in the lane. LOL

[@hotdrippyglass]

You and the team need to pass this one on to the space station for examination in low gravity. Nice work.

[@jonathantamm9202]

You could just hold the screwdriver horizontal so their is no top or bottom quicker and cheaper.

[@bolow]

Steve Mould should be mentioned on the main channel. He deserves that, I'm sure!

[@Rubrickety]

Do they make neodymium magnets with a square cross section? It would be interesting to see if the effect still happens, or happens differently.

[@cryingwater]

*Before watching:* -That's centrifugal force!- *After watching:* It's sad to find out you were wrong.

[@pjninja9546]

Omg wow... I totally thought that it was because of that flinging motion of the spinning. This is actually really amazing haha!

[@isaacthek]

That's basically what I thought it was, though the stick-slip pivoting was an interesting detail to add to my mental picture. It's also why you'd probably have a hard time replicating this with a smaller stack of magnets.

[@benjohnston9455]

I also suspect the same principle that a drill works on whatever that motion is called, it draws the magnets up somehow in the same way that a corkscrew does but uses magnetic forces instead. With both the rotating actions at work it also would be interesting to see theorize is this would be practical for a high rise elevators or even possibly to space.

[@Baekstrom]

That's a nice puzzle. Not so easy that you can work it out in your head instantly and not so hard that you can't understand the explanation. Also a cool conversation starter when you have friends over.

[@MrCyanGaming]

Is it the same for a weight tied to a pole with string?

[@NathanaelDuke]

Stopping at 2:06 to record my guess. Gravity pulls down on the whole stack, making the point closest to the rod a “u” shape, so no matter which direction it rolls, the next point on the magnet cylinder to touch the rod will always be slightly higher than the section that was previously in contact. This compounds over multiple rotations, helped along by the inertia of the previous upward push, making subsequent rises easier and easier.

[@NathanaelDuke]

Ooh, not far off.

[@brenogrady]

Great vid. Very well explained. Another great Channel to sub to!

[@SaraMakesArt]

It would be great to see more videos from you, Derek. When I heard the Community Tab was going to be rolled out to all creators with 10K subscribers and up, I also thought it would be perfect for someone like you whose video style doesn't allow for frequent uploads to keep in touch with subscribers _in between_ uploads.

[@robertt9342]

Neat. So the length of the row of magnets would affect its ability to climb and its rate of climb?

[@byteZorvin]

y dont post video regularly.... i miss ur video

[@jeramiecooper1913]

The next step is to test and verify. Do you have a polished rod and polished magnet to reduce the friction? If you accelerate the rod vertically, at what acceleration does the set of magnets no longer climb the rod? Does the same response occur with square magnets?

[@BoHanQi]

i have one question! why the high pressure of the higher point will make the low point povit upwards around

[@bilalakyuz9866]

The explanation might be incorrect. Look at 5:53, the resulting direction of the rotation of the magnets does not match with the explanation. I think that the pivot point remains the same, but the magnets rotate downwards due to gravity and the resulting momentum, instead of rotating upwards. Then they slip upwards. Micht be wrong, but i think that this explanation is at least not complete... Awesome video still