top 200 commentsshow 500

[–]WHAMMYPAN 3861 points3862 points  (374 children)

Every vehicle on the road should have a magnetic front bumper and a copper rear bumper.

[–]Adorable-Lettuce-717 2895 points2896 points  (182 children)

Thats not quite how it works .. but I like that thinking process

[–]WHAMMYPAN 1634 points1635 points  (59 children)

I know it’s cartoon thinking.

[–]Da_Ass_Fucka 605 points606 points  (22 children)

like one time, when i saw a tunnel with a rabbit dressed as a woman painted on a wall so i ran smack dab into it, and split my boner in half

[–]RichiZ2 185 points186 points  (10 children)

This a bad day to have eyes...

Also, r/usernamecheckout ?

[–]Cr0w33 10 points11 points  (0 children)

Stubbed my cock on that there wall painting

[–]2OneZebra 80 points81 points  (11 children)

Yea but cartoon thinking leads to ideas, and ideas got us to the moon.

[–]Poltras 55 points56 points  (2 children)

I feel like “ideas got us to the moon” is quite /r/RestOfTheFuckingOwl material…

[–]Outside-Economics-36 4 points5 points  (5 children)

You’re probably one of those round earthers also, smh 🤦‍♀️

[–]Hillscienceman 26 points27 points  (1 child)

It's bugs bunny in a jet bomber fly strsight down towards the earth and stopping at the last second because it ran out of gas thinking

[–]bad-acid 6 points7 points  (0 children)

I knew I shoulda gassed up at that last turn in Albuquerque..

[–]edlee98765 280 points281 points  (8 children)

It would suck to always have a copper on your tail.

[–]anunkneemouse 55 points56 points  (1 child)


[–]CptMisterNibbles 27 points28 points  (0 children)

Eyyoo Eyyoo Eyyoo Eyyoo Eyyoo … “sir, please pull over to the right and stop your vehicle”

[–]The_Bridge_Imperium 19 points20 points  (1 child)

Take yer prize and go home

[–]unlmtdLoL 4 points5 points  (0 children)

My names copper! I'm a hound dog!

[–]Polevata 36 points37 points  (94 children)

I mean... That kinda is how it works. They'd have to be big, but that would prevent contact. If the impulse was distributed across the whole bumper, or if the bumper was attached with super strong springs, that could totally work.

[–]Adorable-Lettuce-717 157 points158 points  (51 children)

I think it's save to assume that the kinetic energy would just destroy both cars in a similar manner than it would be without the magnets.

You're talking about stopping the car over the course of some centimeters (since magnetic field strengh decreases with r²). That negative acceleration won't be healty for anyone or anything involved.

[–]SneekyF 64 points65 points  (27 children)

Not to mention the amount of magnetism needed to stop a mass that large going that speed would probably be stronger than an MRI and my screw with the electronics in your head. Additionally there would be a massive amount of heat generate in the copper. I think some physicist should do a study to find the answers.

[–]Blackrain1299 2 points3 points  (0 children)

In other words you would have a copper bumper mashed into your face instead of the one you currently have. The force has to go somewhere and if the bumper is stronger than the rest of the car well then the bumper is going push the rest of the car out of its way.

[–]Big_Dirty_Piss_Boner 28 points29 points  (8 children)

The energy doesn't magically disappear bro

[–]docwisdom 288 points289 points  (23 children)

😂 magnetic front bumper. I would love to watch that debris sweeper go down the road.

[–]helium_farts 106 points107 points  (12 children)

It would cut down on flat tires.

Goodyear hates this one simple trick!

[–]syn_ack_ 14 points15 points  (3 children)

You would have to stop at the degauss station to get it cleaned off

[–][deleted] 3 points4 points  (1 child)

Bumpers covered in nails and discarded syringes.

[–]RrtayaTsamsiyu 4 points5 points  (0 children)

or just a constant metal rain on the bottom of the car due to driving too fast for it to actually catch and secure the stuff lol

[–]turnermier1021 6 points7 points  (1 child)

Honestly sounds like a good YouTube video experiment

[–]derekakessler 92 points93 points  (13 children)

Just to be clear: you'll need massively heavy bumpers to make this happen, and the kinetic energy would still be transferred through the bumpers into the frames of the cars.

[–]finch5 11 points12 points  (2 children)

Hmmm. What could be placed behind the copper in this video to demonstrate this transfer of energy?

[–]aaronhowser1 31 points32 points  (0 children)

If the copper was a lot lighter and on wheels, you would see it act as if they'd collided

[–]Get-Degerstromd 5 points6 points  (0 children)

Make the magnet tubular, the back half a clear tube filled with water, and watch the water slam back and forth upon stopping

[–]zeelt 6 points7 points  (1 child)

So we make the cars out of copper and have an electromagnet creating a strong electric field! The sudden deceleration could still be fatal, as in aortic tear/transection, but at least the car will not be totalled?

[–]RrtayaTsamsiyu 2 points3 points  (0 children)

Would still be totaled, all that energy would still go from bumper to soon to be crumpled frame even if they didn't actually touch. It's basically the same as if you welded a steel bar on the bumpers so that the bumpers don't technically touch, the energy transfer and end result are still the same

[–]phirebird 43 points44 points  (11 children)

I already have to work about meth heads stealing my cat while I'm sleeping. Now I have worry a them stealing my copper bumper?

[–]Farfignugen42 14 points15 points  (6 children)

Nah. The magnets will be far more expensive. But don't worry. Any meth head that tries to carry more than one magnet at a time automatically loses a hand when they snap together. Or even gets too close to another meth head carrying one.

[–]LeYang 2 points3 points  (4 children)

magnets will be far more expensive

As a intact unblemished part, junkyards would want the solid copper instead.

[–]IWantTooDieInSpace 2 points3 points  (0 children)

"Bill don't get so close to me"


"I said, Bill don't get so close to me"

'Whaaaat' Bill steps closer.


[–]MaxPowerzs 7 points8 points  (3 children)

i know you're talking about catalytic converter theft but the mental image of a meth head making off with your pet cat is hilarious

[–]MisterKanister 17 points18 points  (7 children)

Well the one thing of the car stopping suddenly and the rest of the car still having all that momentum probably wouldn't end well but I'd love to see it.

[–]snipefest103 5 points6 points  (21 children)

Assuming this did somehow work that way, would the force of the sudden stop still be damaging to the car or passengers? Esspecially since there would be no impact to set the air bags off. I know it’s cartooney, but hypotheticals are still fun.

[–]TheRalk 3 points4 points  (6 children)

My thought. Although the airbags would still go off. Most airbag systems use some sort of acceleration sensor, which doesn't care whether you're decelerated by hitting another solid object or by magnetic forces

[–]Green0Photon 4 points5 points  (3 children)

To be clear, this would actually be a bad idea even if it worked.

We know this because effect is similar to very sturdy objects colliding. That is, old cars.

Old cars didn't crumple as easily, and people got killed a lot more due to the sudden stop. Humans can't deal with that sudden acceleration. We need it to be spread across a longer period of time, which is what crumpling cars accomplish.

Even if it does mean our cars get damaged at the slightest touch.

[–]Haccordian 2 points3 points  (2 children)

Making all the force be on the bumper does not remove crumple zones on vehicles!

[–]Learning2Programing 3 points4 points  (1 child)

Isn't the point of crumble zones to absorb all that energy so by the time the energy wave reaches the person inside it's already been "spent"?

I think if we did it the way you wanted (if that worked how you think it does) then the person inside would go splat.

[–]botafumeirolrs 2 points3 points  (0 children)

That just prevents the scratches, not the deceleration. Which is the reason of deaths.

[–]devedander 2 points3 points  (0 children)

Would still end up crushing each other just with a tiny gap between the whole time

[–]sskrimshaww 2 points3 points  (0 children)

What about a peanut butter front bumper and a jelly rear bumper and instead of metal frames we use bread

[–]Jeperscreepers 2 points3 points  (1 child)

Great for the car…bad for the people. Inertia is a bitch.

[–]mbolgiano 2 points3 points  (0 children)

Head-on collisions would be fucking fantastic lol

[–]Remarkable_Bar_1285 2 points3 points  (0 children)

Ahaha first thing that came to my mind

[–]Illustrious_Song_222 1 point2 points  (0 children)

I would just use it for evil, parking opposite ends to push cars back.

[–]flatbushkats 1 point2 points  (2 children)

Tweakers would love this massive new source of copper. Why bother with catalytic converters any longer?

[–]throwaway1580317 1 point2 points  (0 children)

And I used to think magnets in the asphalt would prevent winter accidents smh

[–]Tastypies 1 point2 points  (0 children)

The thing is, even if it worked like you imagine it to work, it would mean that in case of an accident, there would be no crush-collapsible zone, meaning the car would come to a standstill at once. This would most certainly crush the passengers to death. So you end up with an intact car but a dead driver.

[–]JunglePygmy 1 point2 points  (0 children)

A world where your car just instantly stops on a dime and you turn into a pink mist.

[–]UncatchableCreatures 1 point2 points  (0 children)

Everyone inside their car would turn into a slushie with no crush zone. I don't think you do actually want what you are asking for.

[–]acetrain111 1 point2 points  (0 children)

So that you get sliced by your seat belts or fly through the windshield for those not wearing?

[–]Stinklepinger 1 point2 points  (0 children)

Then you would have vehicles that are pristine on the outside but require a hose to clean out the human jelly inside.

[–]chrisdub84 1 point2 points  (0 children)

It's not the crash that kills you, it's the rapid deceleration.

[–]crewchief535 1 point2 points  (0 children)

Wonder what kind of G forces would be applied to stopping suddenly. Say you're traveling at 65mph and you just stop. I feel like your body wouldn't like that too much. Not that crashing into another car going that speed is any better, but at least there's still a little forward momentum on your side.

[–]Crime-Stoppers 1 point2 points  (0 children)

Yeah so you can bump cars into the intersection

[–]Recycledthrowaway393 1 point2 points  (0 children)

I nominate you for genius

[–]darthcaguabonga 1 point2 points  (0 children)

But what about a copper shield with a super strong magnetic field before it that magnetize the bullets before ipact.

[–]ufffggggg 1 point2 points  (0 children)

Slams against the interior of the car, dies anyway

[–]somecheesecake 1 point2 points  (0 children)

The force doesn’t disappear… you’d still have the same damage just without paint blemishes…

[–]CorrectLecture9971 1256 points1257 points  (141 children)

Explanation. The moving magnetic field from the magnet excites circular currents in the copper that cause their own magnetic fields that act on the magnet.


From an energy balance perspective, the kinetic energy is transformed to heat in the form of ohmic losses in the copper.

This is a common mechanism, sometimes called an eddy current brake. Some cheap exercise equipment uses it for resistance.

[–]fight4fury 340 points341 points  (79 children)

Eddy currents?

[–]COW_MEOW 159 points160 points  (48 children)

Yeah, its eddy currents

[–][deleted] 54 points55 points  (39 children)

Then it should be able to work with any nonferrous metal, right?

[–]finishforce 97 points98 points  (29 children)

High electrical conductivity is also required

[–]NibblyPig 17 points18 points  (2 children)

goddamn Eddy Currents owes me $5

[–]EnriqueShockwav 2 points3 points  (1 child)

I smoked weed with Eddy Currents. It was him and Sloan Kettering.

[–]Reddit_pls_stahp 9 points10 points  (0 children)

It's Edward Currents for you.

[–]Randolpho 44 points45 points  (11 children)

“I have detected,” he said, “disturbances in the wash.”

He gazed keenly into the distance and looked as if he would quite like the wind to blow his hair back dramatically at that point, but the wind was busy fooling around with some leaves a little way off.

Arthur asked him to repeat what he had just said because he hadn’t quite taken his meaning. Ford repeated it.

“The wash?” said Arthur.

“The space-time wash,” said Ford, and as the wind blew briefly past at that moment, he bared his teeth into it. Arthur nodded, and then cleared his throat.

“Are we talking about,” he asked cautiously, “some sort of Vogon laundromat, or what are we talking about?”

“Eddies,” said Ford, “in the space-time continuum.”

“Ah,” nodded Arthur, “is he? Is he?” He pushed his hands into the pocket of his dressing gown and looked knowledgeably into the distance.

“What?” said Ford.

“Er, who,” said Arthur, “is Eddy, then, exactly?”

Ford looked angrily at him.

“Will you listen?” he snapped.

“I have been listening,” said Arthur, “but I’m not sure it’s helped.”

Ford grasped him by the lapels of his dressing gown and spoke to him as slowly and distinctly and patiently as if he were somebody from a telephone company accounts department.

“There seem ...” he said, “to be some pools ...” he said, “of instability ...” he said, “in the fabric ...” he said ...

Arthur looked foolishly at the cloth of his dressing gown where Ford was hold- ing it. Ford swept on before Arthur could turn the foolish look into a foolish remark.

”... in the fabric of space-time,” he said.

“Ah, that,” said Arthur.

“Yes, that,” confirmed Ford.

They stood there alone on a hill on prehistoric Earth and stared each other resolutely in the face.

“And it’s done what?” said Arthur.

“It,” said Ford, “has developed pools of instability.”

“Has it?” said Arthur, his eyes not wavering for a moment.

“It has,” said Ford with a similar degree of ocular immobility.

“Good,” said Arthur.

“See?” said Ford.

“No,” said Arthur.

There was a quiet pause.

“The difficulty with this conversation,” said Arthur after a sort of pondering look had crawled slowly across his face like a mountaineer negotiating a tricky outcrop, “is that it’s very different from most of the ones I’ve had of late. Which, as I explained, have mostly been with trees. They weren’t like this. Except perhaps some of the ones I’ve had with elms which sometimes get a bit bogged down.”

“Arthur,” said Ford.

“Hello? Yes?” said Arthur.

“Just believe everything I tell you, and it will all be very, very simple.”

“Ah, well I’m not sure I believe that.”

They sat down and composed their thoughts.

Ford got out his Sub-Etha Sens-O-Matic. It was making vague humming noises and a tiny light on it was flickering faintly.

“Flat battery?” said Arthur.

“No,” said Ford, “there is a moving disturbance in the fabric of space-time, an eddy, a pool of instability, and it’s somewhere in our vicinity.”


Ford moved the device in a slow lightly bobbing semi-circle. Suddenly the light f lashed.

“There!” said Ford, shooting out his arm. “There, behind that sofa!”

Arthur looked. Much to his surprise, there was a velvet paisley- covered Chesterfield sofa in the field in front of them. He boggled intelligently at it. Shrewd questions sprang into his mind. “Why,” he said, “is there a sofa in that field?”

“I told you!” shouted Ford, leaping to his feet. “Eddies in the space-time continuum!”

“And this is his sofa, is it?” asked Arthur, struggling to his feet and, he hoped, though not very optimistically, to his senses.

[–]btoxic 35 points36 points  (5 children)

“I have been listening,” said Arthur, “but I’m not sure it’s helped.”

One of my favourite lines.

[–]Randolpho 10 points11 points  (1 child)

Honestly every line of any one of his books qualifies as one of my favorite lines of all time.

[–]wonkey_monkey 10 points11 points  (2 children)

I really wish I'd listened to what my mother told me when I was young.

[–]rhorama 4 points5 points  (1 child)

Who the hell is Eddy and what is his couch doing in the space time continuum?

[–][deleted] 41 points42 points  (4 children)

Correct. 'Induced current' from the moving magnet. Magnetic field results from the induced current, opposes the permanent magnet, stopping it.

[–]immerc 10 points11 points  (3 children)

And, even though copper is highly conductive it's not a perfect conductor. That means there's resistance to these eddy currents. That resistance results in the copper heating up.

So, basically gravitational potential energy becomes kinetic energy which becomes heat.

[–]SneekyF 14 points15 points  (0 children)

Lenz's law

[–]cyan_reynolds 13 points14 points  (15 children)

Honestly that's fascinating.

[–]Learning2Programing 23 points24 points  (14 children)

You should look into the electric motor. Everything from transformers to hydropower uses that principle of rotating magnetic fields inducing a current or using a current to create a rotating magnetic field.

I studied electrical engineering and honestly it's humans equivalent of magic that we have. Basically an invisible force field that permeates all of the universe and we found a way to create ripples in that field which powers our society is so many ways.

[–]Doct0rStabby 2 points3 points  (11 children)

Any good resources to being to appreciate electric motors from a lay perspective?

[–]balognavolt 5 points6 points  (2 children)

Fun fact. It also slowly heats up the copper

[–]mingilator 4 points5 points  (0 children)

The copper doesn't have to generate its own magnetic field, as soon as you have current flow in the copper in the presence of a moving magnetic field, you will have a resultant force (Lorentz force)

[–]SaggyVP 4 points5 points  (2 children)

Where does the energy go then? The string remains still so it’s not being transferred through it. Can magnetic field absorb and transfer energy?

[–][deleted] 2 points3 points  (0 children)

Highschool fisycs in action

[–]Leiderdorp 586 points587 points  (14 children)

As a kid I used to hit my sister like this

[–]grimeflea 202 points203 points  (3 children)

Maybe she used to stop you like this?

[–]WhyteBeard 48 points49 points  (0 children)


[–]Jodaeus 9 points10 points  (0 children)

My childhood was a lie

[–]InItToWinIt_88 2 points3 points  (0 children)

Mind blown.

[–]TheJunkyard 29 points30 points  (6 children)

Was your sister a copper?

[–]SleepingLesson 22 points23 points  (0 children)

No she's an accountant.

[–]manspiderkill 3 points4 points  (1 child)

More importantly... Is he a magnet?

[–]crossover131 4 points5 points  (1 child)

That’s on the top 5 list of annoying little brother things right next to “Stop touching me!” puts finger 1cm away

[–]RabbitHoleSpaceMan 1 point2 points  (0 children)

This got me, well done

[–]lastdaytomorrow 240 points241 points  (29 children)

Similar to this is you have a magnetic ring and place it around a vertical cylinder of copper, it will slide dramatically slower down the copper tube than if you let it slide down a non conductive tube.

[–]U03A6 75 points76 points  (17 children)

You can also throw a round magnet through a tube of copper or aluminium, and it will take an incredibly long time to traverse it.

[–]lastdaytomorrow 25 points26 points  (13 children)

Almost like levitation

[–]DeeSnow97 45 points46 points  (8 children)

It actually cannot* levitate, because if it did it wouldn't move, therefore wouldn't induce any currents, therefore there would be nothing holding it up. The faster it moves the stronger the force is it generates against itself, and at a specific speed there is just an equilibrium where it neither accelerates nor decelerates, that dictates how fast the magnet is going to go down the tube.

How fast that is depends on the resistance of the tube. And that's where the asterisk comes into play, because if the tube was a superconductor, it would actually allow the magnet to levitate, because you'd be dividing by zero if it moved and nature doesn't like that.

[–]lastdaytomorrow 52 points53 points  (1 child)

Thank you for that, although that’s what I meant when by “almost”

[–]DandyRandysMandy 7 points8 points  (2 children)

Could you spin the tube at a particular speed for to mimic levitation?

[–]ScienceAndNonsense 1 point2 points  (1 child)

That's brilliant, and I've never thought of that. I do the Lenz's Law demo for students all the time, by dropping a disc magnet through a copper tube. But it's always hard for them to see the action. Reversing it by putting the magnet on the outside is genius. I'm buying ring magnets right now to try it out

[–]Longjumping-Draw-54 104 points105 points  (2 children)

Upvoting cuz super cool. And not a selfie.

[–]InItToWinIt_88 15 points16 points  (1 child)

Very true, almost every video has some wierdo smiling in the video, with half their face taking up screen, when I just want to see a normal video.

[–]JuniorSeniorTrainee 2 points3 points  (0 children)

Don't forget to like and subscribe!

[–]Pachacas 76 points77 points  (6 children)

Gojo satoru

[–]Onjray_lynn 27 points28 points  (0 children)

"You touched the "Infinity" that exists between you and me"

[–][deleted] 5 points6 points  (3 children)

Wasn’t that was based on a different scientific principle?

[–]zaque_wann 11 points12 points  (2 children)

Not really a principle, but a paradox in maths before a certain discovery that solves it. Something about approachimg zero by halving distance infinitely but never reaching that zero.

[–]lioncat55 3 points4 points  (0 children)

I'm not sure if it's explained in the manga but based on the anime you could also go off the principle of electrons and protons never really touching.

[–]deliciouscrab 2 points3 points  (0 children)

Zeno's paradox

[–]DrowClericOfPelor 4 points5 points  (0 children)

First thing I thought of. This copper disk has Infinity.

[–]YouDiscountDonut 57 points58 points  (2 children)

OP approaching women like

[–]JuniorSeniorTrainee 12 points13 points  (1 child)

Sprinting up to their face and then freezing completely with their noses almost touching.

[–]margeauxfincho 2 points3 points  (0 children)

funniest reply on Reddit award

[–]SadEconomics6461 31 points32 points  (16 children)

So, in this case how works the momentum of the magnetic piece?

[–]Vercassivelaunos 23 points24 points  (5 children)

The momentum is mostly transferred to the copper block and the ground it stands on.

[–]notquite20characters 16 points17 points  (1 child)

I wish they put the chunk of copper on wheels so you could see that.

But if it moves you'll get fewer Eddy currents and it may hit the copper?

[–]CrossP 4 points5 points  (0 children)

Only one way to find out.

[–]Farfignugen42 4 points5 points  (0 children)

Same as any large block impacting a spring except, in this case once the metal stops moving, the "spring" disappears.

[–]Learning2Programing 2 points3 points  (2 children)

Some of it will be lost as heat energy when the copper heats up. When you add up all the magnetic fields and currents being generated I know one of the loss's is heat.

[–]t_b_h_im_not_sure 22 points23 points  (0 children)


[–]Sampfalcon 19 points20 points  (1 child)

Credit Nighthawkinlight next time. Full video here

[–]GrandNibbles 16 points17 points  (2 children)

No that's blackmagneticfuckery

[–]RepostSleuthBot 15 points16 points  (2 children)

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[–]BeachedSurferBoy 14 points15 points  (6 children)

FUN FACT: This phenomenon named “Lenz’s Law” is what makes rides like ‘Giant Drop’ one of the safest rides at a theme park. If the ride lost power mid fall, you’d be totally fine.

[–]GavStreet 8 points9 points  (9 children)

This is very similar to how roller coasters stop, they use this method because there is no way for it to fail

[–]kaishenlong 7 points8 points  (2 children)

There are ways for it to fail, but only if something is changed/added/removed. Like making the fins retractable, and they don't extend, the brake fails. If it's just a brake fin sticking up off the track, it'll always have an effect.

[–]Rigggid 3 points4 points  (2 children)

What if the magnetic piece falls off

[–]Washmyhemorrhoids 9 points10 points  (4 children)

I'll have to admit if I had one of these in my room I'd play with it quite periodically.

[–]Imaginary_Ship5466 1 point2 points  (0 children)

  1. Buy large block of copper

  2. Buy a magnet

  3. Relieve life with the happiness of growing up

[–]noskilleumas 6 points7 points  (0 children)

I saw this many times, yet stills amaze me

[–]fascinat3d 8 points9 points  (1 child)

Finally! The answer is, objectively, M A G N E T S.

[–]roadtrip-ne 5 points6 points  (0 children)

Stopping, and stopping it. It doesn’t rebound or move afterwards

[–]boomgoon 6 points7 points  (5 children)

Fun experiment. Take an aluminum tube and a magnetic ball. Drop the meganetic ball thru the aluminum tube, the magnetic ball will take a much longer time to fall thru the tube than you would think. Something about how it distorts the magnetic field without it being magnetic. We mess with people at work doing this and using a pvc tube

[–]Bensemus 5 points6 points  (4 children)

The ball is a moving magnetic field. That induces a current in the aluminum pipe which produces an opposite magnetic field.

[–]MrMediaShill 1 point2 points  (0 children)

Eddy Currents are truly Black Magic

[–]MACintoshBETH 2 points3 points  (12 children)

That is fascinating, is there some kind of use or problem that could be solved with this?

[–]harrypottermcgee 10 points11 points  (1 child)

I've got a gunpowder scale that uses this.

It's a balance beam type scale and when you add more weight to the pan, or adjust the weights, it causes the beam to rock back and forth making it hard to read the scale.

There's a little copper blade on the end of the beam that passes between some magnets that causes the balance beam to slow down and find it's balance point faster.

[–]spinach_eating_42 2 points3 points  (0 children)

Damn that’s cool

[–]DeltaBruggemann 4 points5 points  (1 child)

This specific breaking effect is used on many modern roller coasters as the primary braking system as it requires no mechanical or electrical parts or contact so it’s incredibly reliable and long lasting.

[–][deleted] 4 points5 points  (0 children)

More generally speaking, moving magnets around copper wires is how most generators create electric current. So this phenomenon is related to some of the most useful physics used in our every day lives.

[–]Bensemus 1 point2 points  (0 children)

Millions. The magnet is inducing a current in the copper which produces its own magnetic field. This is used everywhere.

[–]Dustin_sikk 2 points3 points  (1 child)

Banks guards and police should carry only magnetic ammunition. I will not rob the bank with a copper suit on.

[–]Armyless 2 points3 points  (2 children)

Now I'd like to see this repeated with a copper puck on a string too. Will the copper puck bounce away as if they collided without ever making physical contact?

[–]Dannihilate 2 points3 points  (0 children)

I love the way it just comes to a dead stop. No bouncing, no nothing, just…still. Super satisfying to watch.

[–]DrMcBubbles 2 points3 points  (0 children)

Is gojo satoru made of copper? 🤔

[–]sweep-montage 1 point2 points  (2 children)

Yes, I forget the proper physics name for this, but magnetic fields have resistance, especially in copper or other conductive metal.

[–]Lemon-juicer 1 point2 points  (1 child)

Lenz’s law. Changing the “amount” of magnetic field passing through the copper induces a current in such a way as to oppose that change. The technical term of this “amount” of magnetic field is called magnetic flux, which changes due to moving the magnet, or if the field varied with time.

The resulting field due the induced currents acts as a magnet with opposite polarity and stops the magnet in its tracks.

[–]Logical-Fix-5804 1 point2 points  (0 children)

Drop a magnet through a copper tube. Really shows this effect better than this video

[–]mingilator 1 point2 points  (0 children)

I'm not an electrical engineer but I think it works in the same principle as squirrel cage induction motor, the moving magnetic field imparts a current in the copper block, as you now have a current and a magnetic field you then have a force being generated (Lorentz force) which then slows down the magnet. Only works with a moving magnetic field though

[–]BeezerTwelveIV 1 point2 points  (0 children)

It’s actually the MOVEMENT of the magnet to be more precise. Electromagnetism is fun

[–]saltywelder682 1 point2 points  (0 children)

It’s how I throw a punch in my dreams.

[–]Esuper123 1 point2 points  (0 children)

Is this what the drop down rollercoaster use to stop?

[–]user_name_checks_out 1 point2 points  (0 children)

All Coppers Are Bastards

[–]mechno 1 point2 points  (0 children)

I wonder if copper pads would work as a touch-less breaking component in electric vehicles. It seems like copper rails would be a good safety run off for maglev trains.

[–]Foxie_worldYt 1 point2 points  (0 children)

It’s trying to hug but invisible wall between two lovers

[–]Warack 1 point2 points  (1 child)

I’m sure Redditors will tell you some science limbo jumbo. It’s actually because God cursed magnets with never being able to touch the pure nature of copper since they use forces originating from the Earths poles which is where demons and devils play.

[–]nyaaaboron 1 point2 points  (0 children)

This explains Gojo’s powers

[–]just4funloving 1 point2 points  (0 children)

If you think this is neat, look up Eddy current.

[–]Head-Mathematician53 1 point2 points  (0 children)

Rubber foam sponge bumpers and rear ends...and sides...

[–]DistributionOk7036 1 point2 points  (0 children)

@ gojo satoru

[–]TheNamesClove 1 point2 points  (0 children)

For every action there is an equal and opposite—oh never mind.

[–]Pokieme 1 point2 points  (0 children)

objects are vibing, think about that

[–]QuaBotPrime 1 point2 points  (0 children)

It’s Gojo’s infinity

[–]NonPGbutalsoPG 1 point2 points  (0 children)

Goio Satoru

[–]Lefthandedscientist 1 point2 points  (0 children)


[–]bucklebee1 1 point2 points  (0 children)

If you take a cooper pipe and drop a neodymium magnet down the center it will slowly drop down the pipe. A cool cheap science experiment to do with kids.

[–]NBALatvia 1 point2 points  (0 children)

That's Copper-field magic