"I don't know if it'll take this" meanwhile having a pre-made piece of plastic perfectly fitting the thrust lines
@jonatan01i
Жыл бұрын
maybe it would sometimes collapse when he tried it
@dgphi
Жыл бұрын
That orange thing might have been a drawing tool called a flexible curve, and they might have edited out the tedious footage of the teacher bending it to the right shape.
@erikdeeNOSPELLSNO
Жыл бұрын
I stand with you- once one has done a thing a number of times- it is unlikely that one WOULDN'T know what would happen! Murphy is always there, however...
@erikdeeNOSPELLSNO
Жыл бұрын
@@creamwobbly Who is the bullshitter?
@AdamBechtol
Жыл бұрын
lol
@AdamBechtol
Жыл бұрын
Arches are so neat. Though the term Voussoir may be just as neat. Fun hearing them say it over and over lol.
@dreieinhalbeck
Жыл бұрын
physics has always been my arch enemy, but your videos help me understand much
@--bountyhunter--
Жыл бұрын
HAH!! I see what you did there magic man
@shoty_x1693
Жыл бұрын
I was about to be forced into learning arches but I know damn well that I'll probably regret that later. So I replied no
@SP-ny1fk
Жыл бұрын
Learning is all about building bridges
@thekadend
Жыл бұрын
Could you say these videos helped you bridge the gap in your understanding?
@seppwurzel8212
Жыл бұрын
Probably you had bad teachers, because physics is a VERY interesting topic.
@ApocDevTeam
Жыл бұрын
Whenever I notice in the thumbnail that the documentary looks old, you know it's going to be good.
@75blackviking
Жыл бұрын
That is amazing. I had no idea arches were that resilient to movement.
@SupPartyPeople
Жыл бұрын
Everything's in equilibrium until someone karate chops it
@chris-hu7tm
Жыл бұрын
He didnt know it could take the 1kg weight at that position but you had a line ready for demonstration xD
@HartyBiker
Жыл бұрын
I have a feeling that if the arch wasn't assembled correctly, it wouldn't take 1kg, so he was more making the comment that he wasn't sure he'd assembled it correctly.
@korietnam1967
Жыл бұрын
This gives 2009 weird side of KZitem at night kinda vibes
@leetabix
Жыл бұрын
"There's strength in arches" - Prof. Joe Wilkinson, 2016.
@LucasPreti
Жыл бұрын
I opened this video with the single intent of making this joke
@corytoews5222
Жыл бұрын
"Professor"🤣
@splintmeow4723
10 ай бұрын
I’m so happy I expected this comment on this video, and happily found you 🤣
@ashurean
11 ай бұрын
Arches LOVE staying up it's like their favorite thing to do
@martinsutoob
Жыл бұрын
A few years ago I was idly thinking about arch bridges and the fact that the Earth's surface beneath the bridge also has a curvature - granted not much, but it's there. So the longer the bridge the more the Earth curves beneath it. Take this thought to its logical conclusion and you have a bridge that goes right round the Earth and needs no supports. It becomes a giant hoop that just holds station. But an observer might look up at it and say "why doesn't it fall down?". Answer: because for that to happen, on the other side of the planet, It would have to fall up!
@nomdutilisateur
Жыл бұрын
You have a second like. I love it
@Renteks-
Жыл бұрын
Vsauce covered this in his video "Which way is down?". Ironically, this bridge would appear extremely uneven and undulating, due to having to match the forces of gravity as well.
@javelin1423
Жыл бұрын
so, like a ring? a ring across the surface of the earth that acts as a bridge
@martinsutoob
Жыл бұрын
@@Renteks- I watched the video now. When you say "extremely uneven" I think this is a huge exaggeration.. Vsauce mentions a figure of "almost 100m", but he doesn't point out that this would be stretched over many hundreds of miles and probably not detectable to the human eye. Apart from that there would be other problems with gravitational perturbations from neighbouring astronomical bodies - i.e. the Moon, the Sun, Jupiter, etc - and hence for these and for other other engineering reasons the only shape to build such a hoop would be circular. But this is all just an academic thought exercise anyway, because according to my estimates there is no building material even remotely close to being able to withstand the colossal circumferential compressive stresses that such a structure would develop. No, not even remotely. Some other engineering trickery would have to be employed. Would be a totally cool thing though.
@javiermurillo3561
Жыл бұрын
Man this is brilliant.
@afshinsalehi2136
Жыл бұрын
This is how physics should be taught!
@TheRussianRob
3 ай бұрын
need more of this video!!!!!! don't just wake up the ancient roman in me like that!!!!!
@Warpedsmac
3 ай бұрын
If you look on the web for "The Arch Never Sleeps"...it does exist in its entirety on a university website....Cheers from rainy Sydney Australia
@TheRussianRob
3 ай бұрын
@@Warpedsmac well thank you!!!
@facitenonvictimarum174
Жыл бұрын
It's good to see a teacher who can do more than just use chalk on a blackboard.
@iqbalindaryono8984
11 ай бұрын
Given the resources a lot of teachers would do the same
@seededsoul
Жыл бұрын
Wow amazing. Imagine a walking bridge built like this, and you can feel it move disconcertingly as you cross it! Only faith in engineering can steel your nerves 😅
@JiMwB
11 ай бұрын
Hell yeah! wobbly arch bridge!
@Francois_Dupont
3 ай бұрын
in china every bridge is like this.
@mvpfocus
Жыл бұрын
This video looks decades older than its upload date.
@Warpedsmac
Жыл бұрын
yes.
@NuisanceMan
Жыл бұрын
I wouldn't want to drive over a bridge made of vousoirs.
@nathanjohansen7169
Жыл бұрын
That wiggly arch was awesome.
@ShadyzOfficial
11 ай бұрын
Never heard of Equilibrium before until I saw Oppenheimer. Now I hear it everywhere.
@henzelmen
Жыл бұрын
The arch only works this way if the two lower blocks are rigidly connected to each other. In this example with a shelf. Do the same experiment without a shelf, with two separate blocks at the bottom, then the thrust force will push them apart and the arch will collapse. That is why we see in medieval arch architecture, steel cross-connections between the two ends.
@user4241
11 ай бұрын
Not necessarily. If the arch has the shape of an inverted catenary, it won't collapse.
@anomalyp8584
Жыл бұрын
Just when you think you know an arch...there is an old school video that takes it to a whole other level!
@HailAnts
11 ай бұрын
_"The arch Mr Computer.."_
@Digitallyferal
10 ай бұрын
Wow. Way better visual than anything i saw at Penn State. I would like to build some larger models. Maybe sandpaper on the surface or magnets to help initial assembly. I wonder if theres some Higher level mechanics like a Lagrangian of the centers of mass and friction at tangent points to help describe the “thrust curves” that develop
@jackmclane1826
Жыл бұрын
There always also is a little shearing. The wobbly arch could not wobble without.
@ErnestMC
Жыл бұрын
I miss the good old times, when structures worked with compression only, no rebar, no oxidation, perfection.
@PhilbyFavourites
Жыл бұрын
I am taken back to my physics classes 48 years ago. Make learning fun and you have a student for life 👍🏻👍🏻
@jcopp2031
11 ай бұрын
Awesome video. Thank you.
@Jono4174
Жыл бұрын
I came here hoping to hear the word “voussoir”. I was not disappointed! (I worked at a Voussoir factory where no-one but a French software engineer called them voussoirs.)
@TheTimeCatcher
Жыл бұрын
So how did they call them?
@Jono4174
Жыл бұрын
They called them “Segments” even though they were more like “annular sectors”
@bradleyomar6300
11 ай бұрын
I came to see what the word was because the auto-subtitler gave: boosts was vusual versois fusoir vessel vussoir vuswa vusua vussoir vusoir
@GentleBreeze-72
11 ай бұрын
That Jumpscare at the end killed me. i didnt expect it. Interesting video though
@zakari_rai
Жыл бұрын
Arch jenga seems kinda fun, would be difficult to set up though!
@SwiftNuts
10 ай бұрын
It really is jigglin' tho
@Alex-nv5sw
11 ай бұрын
I grinned when I heard a choir at the end of this vid as if I discovered a knowledge hahaha.
@i.p.0179
Жыл бұрын
Very interesting, Is there a complete version of the video?
@MadNumForce
10 ай бұрын
I always wondered how the French word "voussoir" translated in English. I got my answer: it doesn't. Though in French, when it's part of an arc, the proper word is claveau (same etymology as clef, key). Voussoir is normally refering to an element of a vault.
@sporehux8344
10 ай бұрын
my new favorite word, i never knew existed.
@Perspari
Жыл бұрын
Brilliant video
@nicolasramirez3944
Жыл бұрын
This seems to continue to talk about medieval vaulted structures, what's the original film?
@Warpedsmac
Жыл бұрын
"The Arch Never Sleeps" www.open.edu/openlearn/science-maths-technology/mathematics-statistics/the-arch-never-sleeps?trackno=5
@nicolasramirez3944
Жыл бұрын
@@Warpedsmac Thanks!!!!
@Warpedsmac
Жыл бұрын
@@nicolasramirez3944 Always happy to share resources with other Engineering teachers. Cheers from sunny Australia!
@SoSo-li6dn
Жыл бұрын
Polybridge training
@vinayseth5899
11 ай бұрын
All here for the voorswaw, say "Aye"!
@Untilitpases
10 ай бұрын
Similar principle to the spine. Nature & humanity finding similar solutions.
@-maxipoo-
10 ай бұрын
In 8 years, this will randomly get 17M views
@dejaeprouve
10 ай бұрын
Children play with blocks, adults with mathematical formulas.
@rabenfedersonnenhut
Жыл бұрын
A wise man once said: "There's strength in arches".
@CheapoPremio
11 ай бұрын
The only thing I was able to pick up was that one part is called a Vousuoouuoouuoaaar.
@cheesebusiness
Жыл бұрын
I diеd from the instant transition from science to religion at the end 😅
@Warpedsmac
3 жыл бұрын
If some of the slats are loose between the voussoir and the abutment this would indicate the surfaces are in fact slightly UN-PARALLEL, because clearly it would not be able to be removed ...the lecturer actually confirms some of the slats were loose.
@junkbucket50
Жыл бұрын
A very interesting video, where is it from originally?
@Warpedsmac
Жыл бұрын
@@junkbucket50 if you search: The Arch Never Sleeps
@SynchronizorVideos
Жыл бұрын
Or that the slats were slightly different thicknesses, or slightly out-of-square themselves.
@dangeary2134
Жыл бұрын
Hmmm… If the voussoir contact faces were slightly concave, and the material slightly compressible, would that make an arch more stable?
@GundamReviver
Жыл бұрын
Interesting thought, I figure that would mainly force the material to be under constant pressure in thr tops and bottoms, eventually thst would weather away until the forces are more spread out again.
@dangeary2134
Жыл бұрын
@@GundamReviver my logic was to induce a prestress into the material, and make it more stable. The idea being just the opposite of the convex faces. This would enhance resistance to not only the linear stress, but to lateral and torsion stresses. No swing, no twist, no bounce. Seems to make sense.
@dangeary2134
Жыл бұрын
@@GundamReviver you are a college student, up at this hour, aren’t you??
@GundamReviver
Жыл бұрын
@@dangeary2134 nah, but did start out with a degree in engineering stuff 😂 I figure you are correct in that it would have increased regidity since indeed it would be pre stressed, but thst added hardness would Probabaly mean the "points" pushing against each other would get immense force on them and break and crumble quicker. Also it's like nearly afternoon here, haha, welcome to the internet: it's always daytime somewhere.
@user-gq2wv3br8k
Жыл бұрын
Should it be some special changed shape of the surface of the bricks, or I can cut the arbitrary circularity curved surface?
@BXBZ88
11 ай бұрын
Ecqalibrium... New words everyday.
@sinamirmahmoud7606
11 ай бұрын
😍😍😍😍 civil engineering
@akarshsahay4381
Жыл бұрын
2:30 shouldn’t there also be friction ? Or do the long blue arrows represent the sum of normal and friction?
@eragon78
Жыл бұрын
There are two types of friction. Normal friction requires movement to be occurring which isnt happening in this situation, and then Static friction which resists initial movement between the blocks slipping. Static friction would just resist any slipping and equally cancel it out. While it does technically exist in the model, it doesnt actually have any notable effect and so it can be pretty much ignored for the sake of simplicity. It only really matters if the slipping force is enough to overcome the static friction.
@marlbankian
Жыл бұрын
Interesting
@vect0rwolf
Жыл бұрын
Now I want to play jenga for stonemasons
@blackhawk9256
Жыл бұрын
Very illustrative video. Thank you for sharing!
@m0e679
Жыл бұрын
I just got here from watching Anime. Now i understand about the devil fruit...
@TomiBorchert
10 ай бұрын
very important to know when you laying bricks to make a pizza oven.
@Jetpans
10 ай бұрын
I feel like I should be able to figure this out, but I can't. Would it work if the arch parts (in the second one) had frictionless sides?
@kokekeen3096
10 ай бұрын
The critical point is that the summation of the vectors should make up a 0 vector.
@yoursleepparalysisdemon1828
Жыл бұрын
just like jenga
@rigelmalyk
11 ай бұрын
3:53 the holy triangle
@MACHINEBUILDER
Жыл бұрын
I'm currently on a youtube binge / rabbit hole, but this was very informative and interesting. I've always had an intuitive sense of forces in structures, but seeing the force vectors and the thrust line over a whole arch is very interesting, and kind of makes me want to program a physical simulation to represent different weights and thrust vectors over arches.
@ArtKM
11 ай бұрын
most informative youtube bing ever. nice.
@RobbyBalboa-cj4ig
10 ай бұрын
Why the fuck am I watching this at 2am, I have to get up for work in 4 hours..
@massimookissed1023
10 ай бұрын
At least when you get to work, *_one_* of you will know how arches stay up.
@user-pk6id3gk5r
3 ай бұрын
thanks a lot for item question!
@joeeeee256
Жыл бұрын
nobody mentioning how he just faded into the ether
@sakudoo
Жыл бұрын
I am not sure if at 2:40 the picture is complete: Aren't there frictional forces at both contact points too? - Intuitively, I would guess the whole arc would not be stable if the surface (of the contact points) would be (ideally) slippery.
@theiigotriangularround4880
Жыл бұрын
I guess it would cause there is a vertical component of normal reaction too on both sides
@joshdaly2343
10 ай бұрын
I think there are no major frictional forces in this static system. A friction force perpendicular to the thrust line would result in rotation of the block, we can see this when he adds a weight and all the blocks rotate to a new stable position.
@sakudoo
10 ай бұрын
@@joshdaly2343 Try to build the arch using slippery soap blocks. I am pretty sure it will not hold. Generally, the two planes defined by two contact points on a block are not parallel, hence the two forces will create an outward (or may be rarely an inward) force expelling the block. Yes, this is countered by the gravity of one block, but I am pretty sure that there are also fricitional forces at each of contact points.
@joshdaly2343
10 ай бұрын
@@sakudoo if the soap blocks had the same shape and density as the wooden blocks in the example, then arranged in the same shape they would still hold the arch. It would be very hard to do not (mainly) because the lack of friction, but the fact that there's only one "thrust" line for a particular arrangement of blocks. That's why the arch changes shape when a weight is added so it reaches its unique thrust line whete there's no friction.
@tripslord9029
Жыл бұрын
Anyone else surprised when one of the students gave a good answer?
@lauracarroll3276
Жыл бұрын
❤
@Zzzooooppp
Жыл бұрын
Is there no friction at work parallel to the surface in the arch with strangely shaped blocks?
@xy4489
Жыл бұрын
Had same question. I think you could add the friction forces to the three forces they drew, and add more terms to the equilibrium equation. But, those terms will cancel out. The component of gravity perpendicular to the surface equals the normal force they have drawn, and the component of gravity parallel to the surface equals the friction force, neither of which they drew. At both left and right points. So, my guess is that friction is indeed there and critical to the arch. I didn't look it up though, so this might be bogus.
@xiaojiang2610
11 ай бұрын
There is. The video is misleading. Any undergrad student should point out that normal force is perpendicular to the contact surface in case 1 where cardboards were used for top bricks. Thus friction force introduced by normal force is used to counter gravity. I was so surprised no one pointed it out.
@joshdaly2343
10 ай бұрын
@@xiaojiang2610how can a normal force, which is perpendicular to the surface, introduce a friction force, which is parallel to the surface? The whole point of arches is that they act in pure compression, hence there is no need for friction force. For the second arch in the video, if there were friction forces, the blocks would rotate (as they do briefly when he adds a weight and they come to equilibrium in a new shape with zero friction forces)
@forethoughtx2846
Жыл бұрын
Does thrust require a change in mass to not equal zero ?
@absalondebarvac3715
Жыл бұрын
I don't know if it's been asked before, but what is this from?
@JClover2
2 ай бұрын
Basically Jenga
@bry120
11 ай бұрын
My gf forms a perfect ark
@user-pi7tz3mp7p
Жыл бұрын
Никогда у вас не получиться изготовить в идеале точки соприкосновения, то ,что несут они разные (переходящие) нагрузки_это Да, но приходится вернуться в начало этого предложения
@AndrewNajash
Жыл бұрын
Watch a few clips of NL playing poly bridge and I get this recommended
@Warpedsmac
Жыл бұрын
It's an interesting video...if you like architecture and arches....Cheers from Australia.
@potaterjim
11 ай бұрын
I hated these videos in high school and crave them now
@Warpedsmac
11 ай бұрын
Nice to hear Potater...as I was once one of those high school teachers showing 'em!! Cheers from sunny Australia
@sweeterstuff
Жыл бұрын
youtube is weird like this, video came out 2 years ago, most comments are from this week
@Francois_Dupont
3 ай бұрын
complete documentary?
@tonymok7752
11 ай бұрын
Friction is also there
@deadingu
10 ай бұрын
forsen
@automan1591
11 ай бұрын
What determines the direction of the arrows though?
@EJP286CRSKW
Жыл бұрын
I thought the forces in an evenly loaded arch followed a catenary (cosh(x)) curve. Isn't that mathematics?
@eddarby469
Жыл бұрын
That is the answer for an infinitely flexible member like a cable. But the stiffness necessary to keep an arch from buckling will allow shear and bending forces to develop. This alters the mathematical solution.
@idothings6685
Жыл бұрын
I mean this isn't really surprising at all... you could just have a smaller arch... smaller meaning thinner...
@ferdimro2755
10 ай бұрын
How we Build an arch under ground? -anwseer fast pleas
@massimookissed1023
10 ай бұрын
Either cut an arch-shaped passage, or build an arch in a bigger excavated space, and back-fill with concrete.
@ceiling_cat
11 ай бұрын
It's nice to see that Half-life anouncer still has a job
@snarflatful
10 ай бұрын
No mention of a keystone?
@mayanksingh0044
Жыл бұрын
thx
@BHARGAV_GAJJAR
10 ай бұрын
Does anyone know which university this is ?
@emrebey2244
Жыл бұрын
Is there any civil engineering faculty or science fac.?
@joydasgupta9445
3 ай бұрын
Full link of video
@coolfix948
Жыл бұрын
ಇಂಜಿನಿಯರಿಂಗ್
@mediocreman6323
Жыл бұрын
According to Google-Translate this word means _engineering._
@panda4247
Жыл бұрын
why are they calling the stones with some french word?
@panda4247
11 ай бұрын
@@gregoryford2532 but why? don't tell me the English people did not have arches until the French came. The word "keystone" is English, so why having a weird French word for the other stones in the arch?
@baonkang5990
11 ай бұрын
Thrust..
@nshelekhov
Жыл бұрын
I use Arch btw
@duncannelson2033
Жыл бұрын
Must have a good line of thrust
@Arithryka
9 күн бұрын
1:33
@nemofunf9862
Жыл бұрын
I use Arch btw.
@mutryTwein
Жыл бұрын
نسال دكتور وليد ارناؤط
@Warpedsmac
Жыл бұрын
And what did the doctor have to say?
@luaoliveira4515
Жыл бұрын
Engenharia etrusca
@user-cy9qi8kj2g
Жыл бұрын
I use arch btw
@Awakenedaztec
Жыл бұрын
Arches makes men hard
@Mikewee777
Жыл бұрын
curved erection
@OmnipotentPotato
11 ай бұрын
So there *is* actually strength in arches? Joe Wilkinson was right
Пікірлер: 200