World Record Chain Fountain? The Mould Effect Explained

  • Am Vor 2 Monate

    Steve MouldSteve Mould

    Get your first month of KiwiCo free: kiwico.com/stevemould

    I attempt to to make the tallest Chain Fountain (otherwise known as the Mould Effect). I also explain the science behind why the fountain rises.

    See Mehdi's video here: de-film.com/v-video-hx2LEqTQT4E.html
    See my original chain fountain video here: de-film.com/v-video-_dQJBBklpQQ.html
    See Biggins and warner's video here: de-film.com/v-video--eEi7fO0_O0.html
    See the slow mo video on Earth Unplugged here: de-film.com/v-video-6ukMId5fIi0.html
    See Action Lab's video here: de-film.com/v-video-xHsKJJvcFLQ.html
    See TKOR's video here: de-film.com/v-video-oCfCAKAyKoM.html
    See the self siphoning liquid video here: de-film.com/v-video-bOSVX8zOPkc.html
    See Biggins and Warner's paper here: royalsocietypublishing.org/do...
    See James Pantaleone's paper here: aapt.scitation.org/doi/figure...

    Get 1 meter of the chain from the original video by supporting me in the top tier on Patreon here: stvmld.com/gx23nyjj

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Steve Mould
Steve Mould

You can also discuss this video over on reddit: https://stvmld.com/_sv6ydpm but there's a lot of good discussion happening here too! Really happy to finally see Mehdi's excellent video. I want to talk about one of the main points from it that people are discussing in the comments. The horizontal experiment with the spaced out rows of chain (time code: https://youtu.be/hx2LEqTQT4E?t=617) I don't believe it actually demonstrates the chain fountain. The arc never gets "higher" than where it started (I put "higher" in speech marks because the experiment is horizontal, but you know what I mean - "higher" means "to the right" in the case of your experiment). Yes, the loop gets longer when measured from the top of the pile (because the top of the pile moves to the left, but that's just how chains behave, once you're in steady state the chain will just flow through whatever shape it has. The fact that the peak of the loop actually moves "down" (to the left) in Mehdi's experiment is probably due to friction and due to the fact that it didn't start in steady state. The same is true for the experiment he does off the whiteboard (https://youtu.be/hx2LEqTQT4E?t=956). He lifts it up before pulling it down. It's already up to speed by the time he lets go and so almost steady state - the chain then just flows through the loop he gave it. It doesn't rise any higher than that. I would be convinced that I was wrong if someone could show, with the spaced out beads, the fountain rising after they let go.

Vor 2 Monate
Peter Arisz
Peter Arisz

09:20 on: you do see a fountain, a small one but it is there. The way the chain is built drains energy

Vor 8 Tage
Stop the Philosophical Zombies
Stop the Philosophical Zombies

What happens if you lower the jar/beaker after the fountain has become stable?

Vor 17 Tage
Daniel Brown
Daniel Brown

Is it possible to measure the weight changes of the beaker while the fountain is occurring? Graph out over time, see if there is a correlation. I bet you will see something unexpected. Also, what happens if you lower the beaker from the fountain?

Vor 23 Tage
Milaan Patel
Milaan Patel

Ok, I have many doubts and a Theory here. 1) Your explanation of difference between metal beads and plastic beads, it is not because the kick off effect but it just plastic beads are lighter. You can verify this by using plastic bead chain of same rigid radius of curvature as metal chain. The only difference should be mass of beads. 2) The equations used are the equations of static forces and doesn't include the dynamic effects occurring in system. A more realistic approach would be using energy conservation equations which considers the dynamic effect inherently. 3) The additional force you are talking about comes from the dynamic effect. Let me give an analogy of a planet orbiting star: planet is analogues to single link, gravity is analogues to radial force due to tension. The orbital velocity is analogues to velocity of beads. Lets start the experiment. As the falling length increases the Tension increases and so does the velocity. Conservation of momentum suggests that the orbital radius in such case should be increasing. BUT, the gravity is also a function of Tension. which means that with increase in velocity increases the chain is pulled more strongly towards the center. So there is competition between two forces radial component of tension force and centripetal force. The imbalance between these two forces is changing the radius. (Equating both forces equal would not be right as those equations have underlying assumption that system is static, which actually it is not. 4) As I mentioned in above, the imbalance between radial component of tension and centripetal force is affecting the radius. The magnitude of radial component of tension is more if two links in the chain are more bend wrt each other (Theta is higher). This suggests that chain with shorter links will have less radial force, and force balance will tip towards the centripetal side. hence radius will increase. A chain with larger link length will have more radial component of tension hence the balance will tip towards tension force. Thus, the bead chain with shorter link length has more radius compared to link chain. Also, increasing mass of single link element will increase the centripetal force over tension, that is why the heavier metal chain has more radius than plastic one. In nutshell, qualitatively it would seem that a short and heavy link should have more radius over long and light link, provided both are falling through same height. I do not have any materials to verify this experimentally. I would be interested to see your results, should you choose to do so.

Vor 23 Tage
I Have Youtube Premium🌚
I Have Youtube Premium🌚

Hey Steve, I think this phenomena is somewhat similar to "string shooter".

Vor 28 Tage
Goose Boat
Goose Boat

@Steve Mould I've developed an additional theory and I'd like to utilize a tiny bit of your footage, I'll share my video when it's done rendering in the comments. Do I have permission to use some of the video?

Vor 8 Stunden
David Wilkinson
David Wilkinson

If only there was a YouTube channel with guys who specialize in dropping things from very high up... I feel like you need to collaborate with How Ridiculous

Vor Tag
Toxic
Toxic

18:50 - where's Chris Hadfield when you need him? Oh wait.... Retired.

Vor Tag
Rene
Rene

Hey Steve, This does also happen on climbing ropes. https://youtu.be/jKe72j_mBlU Please see 8:50

Vor 2 Tage
Anthony Chambers
Anthony Chambers

it is applying the Magus effect to the chain as it moves going up at a fast speed. This is applied to every round bead causing an arc, because it can not completed the rotation bound on both sides by a thin wire metal that is not enough to keep it from acting as a round object in motion.

Vor 3 Tage
PinkladyCH
PinkladyCH

what would happen if you would have a chain with simmilar wheigth and size of each sphere on it but the distance between every sphere is 2x as long as it is here?

Vor 3 Tage
Jerry Johns
Jerry Johns

You’re hilarious. And a great teacher.

Vor 4 Tage
lukocius
lukocius

what about the bottom of the chain? Did it reach terminal velocity?

Vor 4 Tage
Zhiyuan Liu
Zhiyuan Liu

Where to buy these???

Vor 4 Tage
whiterottenrabbit
whiterottenrabbit

13:44: Wood block rises just above the white rod. 13:47: "But look what happens when you shoot the block of wood at one end instead of in the middle". 13:48: Wood block rises just above the white rod, exactly as previously. 13:51: Only now the block gets higher. 13:52: Nobody else gives a shit about this half-assery in editing except me... **slow clap**

Vor 4 Tage
John Patch
John Patch

I just remembered you are the official beaker pourer of youtube

Vor 5 Tage
AK Entertainment
AK Entertainment

Steve Mould: it's simple, you can't achieve the same if the speed of the falling is slower Speed = altitude i.e speed of the falling chain will make it raise further from the ground though when reach higher ground you gain height. This is due to the links of the beeds can't be bent close, if the beeds links are flexible this phenomenon will not happen....

Vor 5 Tage
Cassie Moyles
Cassie Moyles

“That’s how that would go” lololol

Vor 5 Tage
Simon Marshall
Simon Marshall

Yeh cool chain n all that , but how am I not seeing any other comments about that fact Steve is wearing his gloves back to front ??? What’s all that about mate ?

Vor 5 Tage
IRON H34RT221
IRON H34RT221

Analogous would be an olly on a skateboard. A downward kick on the tail causes the nose to rise and carry the rear wheels off the floor.

Vor 5 Tage
music byfabien
music byfabien

Without thinking it through : has anyone considered that a string frequency occurs within the metal chain? I wrote this at the start of your video, now at 16 minutes in the horizontal experiment one sees clearly the left to right swing of the chain. Could it be that there is a backward force through the string? Anyway I am not a physician.

Vor 6 Tage
727 Lifted
727 Lifted

I think your thinking of it backwards. I think it is acting like a whip only cracking it upward. The mass of the heavier metal chain is causing the whip effect to pull the chain out of the beaker not push it out. And the more mass of the chain that is out of the beaker the faster the chains whip effect happens thus the higher the chain fountain.

Vor 6 Tage
#41337
#41337

You mentioned the difficulty in measuring the additional force with a scale. If the entire experiment were on a big scale, including where the chain hits the ground, you'd measure the downward force, perhaps?

Vor 6 Tage
David K
David K

I hate when this happens with a roll of toilet paper lol

Vor 7 Tage
Question the Truth - Querzion [One]
Question the Truth - Querzion [One]

Didn't it break because of vibration and not force? Could it also be that the constant vibration caused by the force actually creates a polarisation in the chain which raises it? I'm thinking of how you can make a nail magnetic by hammering on it, check the magnetic properties of the chain, since it's only iron that creates the effect?

Vor 8 Tage
Blainer9r Games
Blainer9r Games

has anyone discussed its prolly because how the beads are made, try putting them into a circle. they phisically cannont rotate that hard unless you break it. its simmilar to my dogtags i got from boot camp. it will pull the beads up to leave the beaker and the greater the force it puls the faster the beads will leave the beaker. the more tension pulling on the beads the more stiff they become. causing them to rise in such way but eventually it cannot hold itself or it loses upwardss momentum. or mixture of both allowing the bend. its all dependent upon how its built. thats why it broke

Vor 9 Tage
Blainer9r Games
Blainer9r Games

okay i had paused the video but now i just got to 14:23 and its exactly how i explained

Vor 9 Tage
Freddy Beaty
Freddy Beaty

Is each little ball catching lift like an airplane wing causing it to rise which is then defeated by too much weight causing it to fall before it can begin to catch lift and rise again

Vor 9 Tage
connor campbell
connor campbell

The force that causes the chain to fountain is the replacement of air in the tube for the chain. The reason it doesn’t happen for normal chain is because it isn’t as dense and there is room for airflow through the chain. Respond with your thoughts

Vor 9 Tage
Nick Dumas
Nick Dumas

To be a proper scientific bet it should surely pay out if you're wrong, not if you're right... Keep it balanced like Hawking's black hole bet did.

Vor 10 Tage
jeremy blatherwick
jeremy blatherwick

https://www.youtube.com/watch?v=xvSmo0I4zIE 3:35 String loop gadget. Same?

Vor 11 Tage
Silas4 Lagoon
Silas4 Lagoon

Have you compared the height to the velocity of the chain?

Vor 11 Tage
Shplem Spörkgaart
Shplem Spörkgaart

Not a scientition, but... My intuitive suggestion is that the energy is getting pushed back by a physics bottleneck. When the chain starts to fall it's accelerating, until it hit's the ground, at this point there's a knock on effect up the chain, until it reaches a point where the the downward force is greater than the speed. This force "piles up" in the chain, causing it to arch up around the point the energy equalises. This would also explain the height thing, which probably tapers off around the chains terminal velocity, when the energy build-up stops increasing.

Vor 11 Tage
derDere
derDere

Someone has done it with a rope! https://youtu.be/HoSKvBweOrg

Vor 12 Tage
Miller Four
Miller Four

16:00 that’s genius!!!

Vor 12 Tage
Csaba Kiss
Csaba Kiss

I would also intuitively think that the "rod pivot" action happens at the peak as well and as the downward part is accelerating down it may in turn pivot the tail end upwards addig to the overall effect. Is it maybe the case that it can pivot upwards some against gravity stealing energy from the downward part? That way the tail end may pivot higher than the center of mass lifting the raising end ever so slightly. I am just brainstorming here...

Vor 13 Tage
Anders Persson
Anders Persson

Is velocity fixed? No, gravity will continue accelerating the chain velocity downwards, so there must be a whiplash force… Just thinking intuitively… And if you have a chain that is not “fixed” like the bead chain, then the instability will prevent the whiplash… Does it work with a rope??

Vor 13 Tage
Dean G
Dean G

Gyroscopic effect!!! The balls are spinning.

Vor 13 Tage
Flin Faraday
Flin Faraday

Lunch costs a $100 in Canada?

Vor 13 Tage
Nico Nico
Nico Nico

You should make a few tests to improve our understanding of this You should try with different shape of pots, different weight of chain, different rigidity, different way of packing the chain... to see what variable has an effect. What does it do if you tilt the pot 30 degrees, 45 degrees, does it still shoot up? Does it work if you drop the chain from the side of the table? Without lip to go over. What if you tried when there is wind so the chain doesn't drop straight down? Do you have the same effect if you drop the chain from a moving vehicule, does the chain go forward before going back? I think it has to do with some travelling wave effect or whipping effect.

Vor 14 Tage
Shawn McCarthy
Shawn McCarthy

Mechanical engineer, freshly graduated here. I've seen both videos and 2 response videos currently available. But in this video Steve brings up the energy view but resolves the energy argument by saying a kick off force must exist reclaiming energy. I would argue that's not an energy balance explanation. An energy balance explanation would be that work is done on the string to deform it into it's twisted/bundled shape in the glass. So as it is coming out of the glass each bead bend acts as a torsional spring releasing energy. The mould effect would only appear in strings that store more energy when bent than will be lost due to air resistance.

Vor 14 Tage
Jason Morris
Jason Morris

Reminds me of the very heavy chain anchor drop off a ship. More _weight_ more *violence*

Vor 15 Tage
Ivelsuop
Ivelsuop

This video is better than your second one!

Vor 16 Tage
Patrick Burns
Patrick Burns

Reactive Centrifugal Force

Vor 17 Tage
Kevin Penfold
Kevin Penfold

The Mould Effect 😹

Vor 17 Tage
kew eyz
kew eyz

9:25, you do see it with other ones. It's happening w what you used. The only reason it can't go high is bc it's losing energy and it weighs more.

Vor 17 Tage
Matt S
Matt S

Your gloves were on backwards and I imagine your underwater inside out. More attention for the science though! 😀

Vor 17 Tage
ThanksForAllMyToes
ThanksForAllMyToes

Isn't it just the "whip effect" but "never ending"?

Vor 17 Tage
S Barrett
S Barrett

PAUSING THIS AT 7:00. my prediction is that the chain speeds up as more beads come out. the force that's pulling the beads out is strictly the weight of the beads.. the reason it raises off the side of the beaker could be the whip effect. energy traveling through a line until it gets to the end.. height matters because the very first bead with the weight on it reaches if not quite terminal velocity then very close to it. tl:Dr.. the weight of the beads already falling is increasing because it pulls beads out. the height is directly proportional to the speed of the lead bead (lol) as it increases it creates what I'm gonna call the whip effect 😂

Vor 17 Tage
Stephen Seachord
Stephen Seachord

The back force of the beads is creating a harmonic frequency that balances the chain in the air.

Vor 17 Tage
Eagleizer
Eagleizer

Chain Fountain explained in less than 2 minutes: https://www.youtube.com/watch?v=orFTG1DzZrg&lc=UgxYOb3rYep2Gyvtjgt4AaABAg&ab_channel=Eagleizer

Vor 17 Tage
ian hennus
ian hennus

Am I the only one noticing he has his gloves on wrong way around left and right, causing the top of the glove to be in the palm of the hand? So I need to thrust the explanation of someone who cant even put on gloves? ;p (chill its just a joke, I like the whole discussion going on)

Vor 17 Tage
Azareal Bheri
Azareal Bheri

Does it have any influence on the String theory?

Vor 18 Tage
TexasDieselGuy
TexasDieselGuy

Its centrfugal force. When the chain moves through an arc path it is centrifugal force that pushes it to maintain the shape of its path. In the chain fountain, the arc only exerts an upward force because it is only the top half of a circle and it is this force that pulls the fountain higher.

Vor 18 Tage
Darian Tolofson
Darian Tolofson

You're both 33% accurate Newton's second law of motion. What you 2 are bickering over is how a barrier will guide the chain, and yes the chain can act as a barrier towards it's self! Tension and friction are also very pronounced forces with these chain experiments. Sir N's 2nd law is also why the gyroscope structures in your ears can stabilize you on a bicycle and why at a certain speed threshold you can ride with no hands.

Vor 18 Tage
TheOneG36 జ్ఞ‌ా
TheOneG36 జ్ఞ‌ా

you argument gets boom i would say comparing yours and his. i mean he lets your legs explode, common its since! your dead... ;O

Vor 18 Tage
Willem Bez
Willem Bez

I believe your initial upward momentum explanation is spot on. I recommend playing with gymnastics ribbon.

Vor 18 Tage
Orley Eduardo
Orley Eduardo

So... I think the chain breaking is a pretty good fact in favor of momentum argument... The forces became so great that the chain got overloaded and broke

Vor 19 Tage
Altay Nuhoglu
Altay Nuhoglu

Centrifugal Force is F=mv^2r. You used the equation for centripetal force which acts perpendicular to it. Intuitively it doesnt make sense for the radius not to be important. When the chain falls out of the cup, the chain's limited bend radius forces its movement to conform to a circle, creating a centrifugal force. The centrifugal force of the rotating chain segment maintains an arch, not a complete circle! With no downward centrifugal force, the upward force counteracts gravity's effect on the length of chain suspended in the cup. As the velocity of the chain falling from the cup increases, so does the radius of the chain's motion increase and the centrifugal force lifting the chain from the cup, until the lifted chain becomes massive enough that gravity's effect on it is equal to the centrifugal force. When the falling chain hits the ground, it creates a wave up the length of the chain. (This can only occur if the distance between chain segments is fixed.) If the wavelength of the wave up the chain is less then the radius of the chain arch, then the radius would become constrained. If the radius is constrained, then any gained velocity by the falling chain must increase the centrifugal force lifting the chain up and not the chain radius. Basically the the chain accelerates at a constant velocity constrained by the radius of the chain fountain's apex with the resultant force accelerating the chain lifted from the cup.

Vor 19 Tage
mrbiggsofficial
mrbiggsofficial

1:47 spontaneous beard growth is the real scientific issue we should be trying to decipher here

Vor 19 Tage
SemenTheSailor
SemenTheSailor

Both you and Mehdi have made great videos. It’s incredible you’ve discovered this and this discussion has been brilliant. However, I think Mehdi is right about this. Either way it must be so exciting to be a part of science of a relevant scientific discussion. I hope we learn a lot from this.

Vor 20 Tage
keith ross
keith ross

The acceleration downward is 32ft/squared (ideally). The initial acceleration upward is greater than that until they become equalibrious, and the distance and time it takes to reach that equalibrium looks to be a function of the length of chain that has fallen.

Vor 20 Tage
P C
P C

Did the chain break, or slip out of the coupling? Seems like if it slips out, that problem could be overcome but I’m not a psycicsist

Vor 20 Tage
Cameron Varley
Cameron Varley

I feel like the weight of the bead matters alot in this experiment

Vor 21 Tag
Shirley Potter
Shirley Potter

why would anything happen on the space station if there is truly no gravity? The end will just float and the distance will be regulated by the force pulled and the resistance of the chain against the container lip I believe.

Vor 21 Tag
Canadian Goose
Canadian Goose

im with electroboom

Vor 21 Tag
VirtualJMills
VirtualJMills

The top, the pot, there's an anagram in the making there.

Vor 21 Tag
Darshan Neupane
Darshan Neupane

its all about inertia ... the higher mass of the chain falling towards the ground provides more than enough energy for the part of the chain going upwards towards the rim of the container....the velocity of up moving part is higher than the falling one which provides just enough energy to slowly increase the height of the system so that the system can stay in equilibrium...... an initial force is required for the chain when falling from a flat surface so that the chain starts moving upwards and then down rather than horizontally and then down .

Vor 21 Tag
M Whaley
M Whaley

Has anyone taken two sheets of plexiglass and made a container that allows only 1 bead diameter stacked on each other linearly and filmed in slo mo?

Vor 21 Tag
Kyle Fillingim
Kyle Fillingim

your tension argument is wrong. the tension at the top will be less than the tension at the pot, and that tension is less than at the ground where the chain ends up. It is a gradient. Momentum is responsible. there's a pull up force at the pot causing an acceleration, which decreases until the chain reaches the peek where gravity takes over and is instantaneously the only vertical force on the chain segment. After that moment the tension from the part further along takes a roll in helping gravity pull the chain back down. Momentum is the culprit. I have done this experiment with rope and seen the same effect, just not as pronounced.

Vor 22 Tage
Airwaves English
Airwaves English

I wonder if you could make a long chain-loop and let it run indefinitely between two glasses?

Vor 22 Tage
Johan Meijer
Johan Meijer

I wonder if less gravity would also make the chain go higher. Now that would make a cool video, repeat the experiment on the moon 😄

Vor 22 Tage
Johan Meijer
Johan Meijer

Oh wait, you made the same suggestion at the end of the video 🙈 I commented too soon

Vor 22 Tage
B. A. Lineman
B. A. Lineman

Something simple to help figure out something complicated… slow motion video the scale… I thought I seen an increase in weight on the scale a couple of times… I will slow this video to hopefully verify

Vor 22 Tage
Saeed
Saeed

It is more of a fluid dynamic problem than simple dynamic writing T = AB2. In fluid dynamics, we have viscosity and also dynamic viscosity playing a huge role. when the chain goes higher the energy is dissipating in a stochastic way with a higher rate having a controlling effect on the system. Take the chain parts as fluid molecules, yet with a very high one-directional non-linear viscose force acting on them. Maybe this gives a clue about what is happening. This video was really great, Thank you for the time and effort creating it.

Vor 22 Tage
Igoor Silver
Igoor Silver

Why go to so much trouble to rent one crane? You could just drop it from a bridge or a building... If you don't want to lose the chain, you could just attach the end of it to something

Vor 23 Tage
Timothy Kramer
Timothy Kramer

Second video I'm watching regarding this effect and would like to share my thoughts, thanks youtube algorithm! Personally I'm a recently graduated Msc. hightech engineer (follow-up on mechanical engineer), so I just want to express my thoughts after watching this video. I immediately thought it was due to conservation of momentum in combination with Newton's first law and finally energy/force balance. First the rope with weights is thrown in in the air to provide some height and energy to the system (rope), also to avoid losses due to cup contact. Then the airborn end of the rope starts dropping downwards due to gravity to the left part of the cup. The downwards going part (left part of the cup) of the rope increases in momentum, since its mass increases due to increased length (m_left*v). Since the right part side (part that's going upwards) only increases slightly in length compared to the right side, we could say that the momentum on the left side is bigger than that of the right side. I.e. there's force imbalance, which accelerates the rope and forces the top to rise, but why? That is because the right part also has to increase in momentum. As stated in Steve;s first video, the beads move at constant speed (probably close to terminal speed if the height is sufficiently high). This means that the only way to increase in momentum, is more weight, which equals to an increase in length. This goes on, until the beads hit the ground at which point the length is fixed and its left momentum remains constant or there's force balance. Then the system responds and the right part reaches its final height to which the complete system is in balance. It retains its shape since objects that remain in motion, would like to remain in motion (first law of Netwon). And its shape is the optimized shape, since it is the lowest energy losses in the system (minimization of the potential energy). The reason the rope broke, is because the total energy within the system got that large due to its total increase in momentum, that it caused the wire to no longer uphold. The strain got too large. I have also posted this on Steve's first video. I'm going to watch yours and his final video too!

Vor 23 Tage
TheSunExpress
TheSunExpress

This needs doing aboard the ISS. Who has some clout at NASA? Maybe we can threaten a NASA Smurf with kidnapping their cat? (Catnapping?!) A load cell and/or force transducer needs to be attached to the "pot" while in micro-gravity. A flight aboard the Vomit Comet might not be long enough to gather data sufficiently comprehensive. This experiment sounds like the sort of thing JAXA & their astronauts would be interested in demonstrating.

Vor 23 Tage
Gnana Prakash
Gnana Prakash

That equation at 12 mins was like starting with A=B but also, A=B+C so, B=B+C. At this step you should already understand one of them is wrong. In this case, it's the first equation that's wrong. You only took centrifugal force as equal to the tensile force but ignored the tensile force resulting from the weights of the 2 sides of the chain.

Vor 23 Tage
Samuel Inácio
Samuel Inácio

I think your conclusion (and of the paper you cited) of the Equation T = λ v^2 is flawed. The fact that the radius does not come into this equation does not mean that it can be any arbitrarily sharp corner (R), it just means that T is INDEPENDENT of R. Nothing can be concluded from this, the radius can still be bound and be a function of inertia, and be irrelevant for the Tangential force.

Vor 23 Tage
Ringo Cash
Ringo Cash

Try other link chains from very high heights maybe then it will show your effect

Vor 23 Tage
Percy Phelps
Percy Phelps

There is no way in the world anyone could get me up on top of that crane. You must have balls of steel.

Vor 24 Tage
Post Sisyphean Era
Post Sisyphean Era

Err.. Where is the paper Mr Fungus?

Vor 24 Tage
nagchampa
nagchampa

What if you put the chain on a soft sponge in the jar? Like as a shock absorber?

Vor 24 Tage
John Malcovich
John Malcovich

Could you try to conduct the experiment in a vacuum. I think it won't work

Vor 24 Tage
Erik Knepfler
Erik Knepfler

Hmm... could this be a method of launching satellites into space..? Would have to drop it off a very tall building, or maybe out of a plane, and then just disconnect the satellite from the chain at the right moment. Or perhaps launched out of a cannon from the ground level with sufficient force to give it that initial kick in the pants.

Vor 24 Tage
Kevin McFadden
Kevin McFadden

So what makes this chain go up and down? Is this the Mould effect? https://youtu.be/d69PgfG86Go

Vor 24 Tage
nathanael immanuel
nathanael immanuel

Mark rober big mad right about now

Vor 25 Tage
GT0NY
GT0NY

I waited till the end the second attempt from the crane

Vor 25 Tage
Ahmad Mansour
Ahmad Mansour

i think the way you find the reason for the upwards force is by finding the length of which the chain rises for a certain height and length of chain then have a support beam at that height with the chain looped around it. After that introduce a force to the dangling side that is equal to the gravitational force on the chain and removing the support beam by dropping it downwards (not removing it sideways to avoid interrupting the system).

Vor 25 Tage
Woodstock Dz9
Woodstock Dz9

Nice, but I think Mehdi is right. Now I gonna on his channel and say that you are right. XD

Vor 26 Tage
Valerio Amedei
Valerio Amedei

Confused as I am theres one thing from both of yours 2D experiments that I think should be key: In Mehdi experiments the chain is arranged so that it can't push against anything to lift itself, and the effect still occours.

Vor 26 Tage
peaou
peaou

Looks like a whip

Vor 27 Tage
Heartbreak and Motor Jive
Heartbreak and Motor Jive

@18:00 had me laughing

Vor 27 Tage
Peter Dobeš
Peter Dobeš

keep your focus on one of the beads. Somewhere near the beginning of the chain. The chain is being dropped from a flat surface. Our beed begins to accelerate horizontally towards the edge of the surface. As it goes over the edge its front dips down and its rear turns up. If it were to come to the edge of the board in such speed, it would want to fall down in an arch. But the weight of the chain pulls it down much more sharply, which translates into its tail shooting upwards. The shooting up of the rear of our bead flings the second bead up. It doesn't go just straight as the bead before it, but straight and slighty up. But then its pulled down too, and harder, because it was moving against the gravity. And again the front dips down and rear flings up, but more aggresively, launching the bead behind it even higher. And it goes on like this making the fountain higher and higher.

Vor 27 Tage
AtzeDav
AtzeDav

So, if you put a pillow on the bottom of the pot, you shouldn't be able to see any fountain?

Vor 27 Tage
Wouter Stekelenburg
Wouter Stekelenburg

Have you tried to put the pot on a scale, to measure the force of the chain fountain pushing down?

Vor 27 Tage
Marcell Horváth
Marcell Horváth

However one thing where simulations are not realistic enough is exactly what you pointed out at the end: how is this seemingly chaotic system has a very predictable property - the trajectory of the beads. That's just as interesting as the height of the fountain.

Vor 28 Tage
Marcell Horváth
Marcell Horváth

Check out the (numerical) simulations as well - they work very well and help find out what the right conditions are!

Vor 28 Tage
cunin stunt
cunin stunt

lol "you just reversed the footage" dude thats one of them thinkers ive been told exist

Vor 28 Tage
Zenovarse
Zenovarse

Is there a video of varying the speed of the consumption of the chain on a 2D surface? That would probably simplify this, if it's not already explained.

Vor 28 Tage
Simone Santonoceto
Simone Santonoceto

https://youtu.be/qTLR7FwXUU4?t=628 one part of the equation has approximation, maybe you're neglecting the part that gives sense to the equation. =)

Vor 28 Tage
Ryan Harriss
Ryan Harriss

"The Mould Effect" besides this experiment, I have it in my bathroom from time to time 🙂 (couldn't resist). Its a cool project, quite baffling even with your explanation. Nice one!

Vor 28 Tage
Ronan Tremoureux
Ronan Tremoureux

I would be interested by a test in a vacuum chamber, to see if this is the effect of the air on the marbles

Vor 28 Tage
Craig Goodall
Craig Goodall

https://youtube.com/shorts/pOpHxUfJrHs?feature=share this interesting... I know it's probably not but I think it looks like mould effect or atleast may explain something to do with tension in the mould effect. 😎

Vor 28 Tage
Maxwell_ Edison
Maxwell_ Edison

So, if it works like a chain of rods.. Would that make it a better effect if you used a literal chain of rods? Can you optimize the shape of the beads to make a stronger effect?

Vor 28 Tage

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