Can This SOLID GLASS BALL Survive a 45m Drop? 

The beautiful coney-joney was first discussed by Hertz back in 1881 and has henceforth become known as Hertzian cone cracks. They typically occur when a hard spherical object is pressed into the surface of a brittle material. In this case, the sphere itself is made of a brittle material (glass) and is "pressed" into the steel plate when it impacts, but the same effect is present. The cone-shape is caused by the propagation of a crack. The crack begins its life as a ring just outside of the region that's in contact with the plate, where the tensile stresses (the kind that pull a crack open) are at their highest. The crack generally then grows orthogonally away from the surface for a short distance before turning and heading away at a coney-joney angle. The path followed is one that maximizes the release of stored strain energy (the same sort of energy that is stored when you pull back a rubber band). The maximal strain energy releasing path is ultimately guided by the local magnitude of the stress fields (similar in concept to the gradient of the pressure levels in the glass upon impact) near the leading edge of the crack. All in all, for spherical contact such as this, the stress fields basically say to the crack, go be a cone, it's the best release. Source: PhD in this area

It’s called a “conchoidal fracturing”, and occurs in glass and glass like rocks. It’s one of the key indicators archaeologists use to identify stone tools and tool scraps. When the force of the strike moves through the glass, depending on the angle and force, the fracture absorbs much of the force (you can see that in the ripples left on the new surface of the glass) allowing for precise shaping. Basically, glass + force = conchoidal fracture.

This is arguably the most scientific one of you guys' videos has been, observing the state of the dropped glass being so similar every time. The Coney-Joney effect is very fascinating, and I bet this video could be used as a scientific case study on it.

Just imagine in 1000 years if archeologists ever dig up that area all the awkward things they're going to find buried beneath the surface.

The "Coney-Joney" is created on the plane of maximum tensile stress. Glass is a very hard material with high yield (strength) for compressive and shears stresses, but is much weaker in tension. This is why the impact point, being under compression, survives. In a material, tensile, compressive, and shear stress exists simotaneously in different directions. The maximum tension occurs because of the inertia of the material outside of cone pulling down. While the material inside the cone is more effectively stopped by the impact. this is a result of the load propagating within the solid angle of the cone commonly called a frustrum. The waves are probably due to a change in fracture phase. Entering fast-fracture phase results in an unstable (wavy fracture). This is my understanding based on structural mechanics. Hope it helps.

I think the cone thing is happening because glass is strong in compression, weaker in tension - the point that hits the surface is experiencing compression forces - the parts to the side of it are overhanging the point of contact and because they want to continue moving downwards (Newton's first), these parts are under tension with respect to the part in contact with the surface, so they tear off - this is really clear to see in the slow-mo for the first drop of the small sphere Also, they exhibit conchoidal fractures because the glass has no crystal structure with planes of weakness along which to break.

I think Rexy’s been through a lot and now he deserves a relaxing day at the spa

Just incase anyone was wondering, I know I'm months late on this video. But it fragments like that because it's a sphere hit a concave object being the metal plate. So only the the one side on impact that connects takes the blunt force of impact creating the fragment shap. If the force isn't high enough due to the diameter of said object then the entire thing won't be effected.

Coney Joney: Solids are much weaker under tensional stresses than compressional stresses. Due to the amorphous structure of glass, it is very strong under compressional stresses and so will only break in the places of high tensional stress. This tensional stress occurs in a cone radiating from the small point of contact and is due to the rapid deceleration of the ball. The top and middle of the ball remains in compression so does not fracture at all. Edit: In addition, as other comments have said, the ripple effect on the surface is called conchoidal fracturing, and this occurs in materials with no crystalline structure. It is the result of the way the shockwave and hence the tensile stress is transferred through the ball. It is the same process by which flint tools were made back in the day.

4:10, for those of you who are interested, that kind of crack is called a Conchoidal fracture (Con-coy-doll spelled phonetically). It means the overall shape of the fracture is cone like in nature, where the “positive” cone is popped out of the other side of the medium from the site of impact, and the surface that is impacted (be it by projectile, or tool) is the smaller end of the “cone.” Also, the scientific reason for this phenomenon, is (as most high silicate solids are) Glass is an amorphous solid. So, there is no set, and repetitive “path of failure” (usually following the boundaries of the crystalline structure of a medium) in the material, and therefore, the force gets distributed, and absorbed nearly evenly, resulting in conical fractures, and an easily identifiable point of impact. Since there is no repeating crystalline structure, there is no “stress accumulators” in the material. no sharp angles, no well defined crystalline boundaries, and therefore no where for the stress to accumulate, resulting in the failure of the entire crystal, rather than in between the crystals. As a side note, this can creat edges sharper than a razor. (I learned this the hard way, when I picked up the primitive art of Flint Knapping)

Love how they are still doing dropping stuff from high place, it’s a classic for the ages

The glass is strong against compression, like concrete.And the point where it impacts the metal plate is the one where the stress is purely compression, that explains the point. The parts that fall off shattered from the ball due to the shearing forces applied on impact, since there were nowhere for the energy to flow easily. The parts that stayed were mostly being supported by that one point in the cone. The waves are probably a result of the manufacturing process, since the small glass ball has less waves and has probably been made in less layers. One easy way to understand how strong glass is against compression is trying to brake a piece of small glass by pinching it between your thumb and index. Unless you have the glass bending, it will probably not brake.

The glass spheres’ unusual breaking effect is called concoidal fracturing (credit to ttv_aussieloverkangaroo for the clarification) due to the distribution of force as it hits the steel plate. Read #1 for info on the cracking of this glass, read #2 for info on why your shirts were burning. #1 Glass of this type is of an inorganic silica compound, and is uncompressable. The force has no place to be released, so, consequently, the force pushes the sides of the glass sphere out in a shearing motion. This is called shear loading. Directly on the point of contact, the glass stays almost completely intact, as it is being pushed w/ extreme force, that is then diverted downwards, and outwards creating the cone effect. These glass spheres might’ve been made similar to how a Prince Rupert’s Drop acts. A Prince Rupert’s Drop is basically a tear drop of molten glass dropped into cold water, creating a piece of glass where the outside is instantaneously cooled, but the inside is still hot, resulting in a force that pulls inwards towards the center of the glass drop. The drop is extremely hard, but if nicked at the tip, can shatter in milliseconds (watch SmarterEveryDay’s video that better explains it here - m.ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-xe-f4gokRBs.html) The Prince Rupert’s Drop style effect COULD explain why the sphere is so hard; when it was cooled, the inner glass of the sphere cooled more slowly, creating a force that pulls inwards towards the center if each ball. This makes it extremely strong, and creates the cone effect. The reason that a pattern seems to emerge where the cone’s shape is almost identical dropped from 10 meters and 45 meters is that, as I said earlier, the glass is uncompressable, and the maximum exerted force was not yet achieved. This might be possible if the spheres is dropped from a much greater height onto a material that would not absorb a lot of force (the plate in the video absorbs a lot of force because of its wobbling, and the sand further absorbs the shock) such as a mangalloy plate fused to concrete, as the plate wouldn’t be able to move, and acts as an almost immovable object. I’m led to believe that if the glass spheres succumb to the force and eventually are smashed against something with enough force, they will either crack into multiple large chunks, OR shatter into different shapes, where the closer to the point of impact, the smaller the pieces. #2 My hypothesis on why the spheres built up such a strong magnification of the sun so quickly is just the nature of the ball. In you cut it in half, and aligned the cut side parallel to the sun, you’ll see that the side closer to the sun is shaped like a concave lens, and as the rays hit the ball, the energy and light is dispersed. When it reaches the other side of the ball, it meets a convex lens, which concentrates the rays of light. It’s basically an extremely efficient magnifying glass. More technical info on Hertzian Cone Cracking- royalsocietypublishing.org/doi/10.1098/rsta.2014.0135 Concoidal fracturing in other circumstance- www.sandatlas.org/conchoidal-fracture/ Feel free to blast me in the comments of my comment. I understand not everyone will agree with me/believe this is self-research and not plagiarism. But I really don’t care.

thats called a Conchoidal fracture. A Conchoidal fracture is a smoothly curving fracture surface of fine-grained materials which have no planar surfaces of internal weakness or planes of separation (no cleavage). Such a curving fracture surface is characteristic of glass and other brittle materials with no crystal structure. its the principle behind flintknapping.

I've been watching this show for ages, kinda addictive and satisfying just seeing y'all doing all that ridiculous stuff 🤣🤣🤣 may I suggest something? How about trying different guages of bullets on the glass spheres and for the finale you shoot it with a tank 😱

It all comes down to “hardness” vs “toughness”. Glass is an extremely hard structure which also makes it extremely brittle (hard but not tough). When something that hard has significant force applied, the glass wants to break but chooses the path of least resistance (to expend the energy applied). Because it’s a sphere and tensile strength is evenly dispersed, the path of least resistance is outward, not through. The only reason it doesn’t come out in a perfect cone is due to inconsistencies in the glass “grain structure”/shape.

David Attenborough in the bushes: here we see three Australian males in their natural habitat dropping objects from a great distance in the name of science. While many people don’t understand their dialect they watch for enjoyment. Today we see them drop glass balls from this great height. They celebrate the achievement by screaming that it has a coney joney. This is a self dubbed name as it is unknown what the name of the real effect is. On closer inspection they discover that by some pure miracle the impact point is unaffected and their celebrations grow larger. The effect is most likely created due to how the builder constructed the ball. Upon closer inspection you can see how the ball has fractured in layers. Unbeknownst to these males they ask there large worldwide following to explain it to them. The public then responds by giving their best explanation below in the comments section as it is referred to in hopes of recognition. I have been studying all sorts of different animals in the past, but this one just straight up confuses me.

5:55 Given the brittleness is from an incredibly rigid lattice, I'd expect there's close to 0 elastic deformation in it. I am sure that all energy that didn't go into splitting it went into deforming the steel which acted like a leaf spring, providing an apparent bounce.

Somethings biting me?!?!? Nope just the sun burning you. Classic.

Lots of people have said that the cone shape is caused by conchoidal fracture, and tried to define it, but no one seems to have explained WHY conchoidal fracture exists. I have a degree in geology, but I'm less clear on the physics, so while I think this is right, a physicist might be able to clear up my hazy spots. Basically, glass (and rocks like obsidian) are formed by the very rapid cooling of a liquid. In obisidian's case, molten lava, and in glass' case, melted down sand. Because the liquids cool so fast (by going from volcano to cool air for obsidian and by being quenched in water for glass), the minerals in them do not have time to arrange themselves into large individual crystals. Instead, they form microscopic crystals that slot together so perfectly that they are like one big one. This is what makes it simultaneously so strong in terms of compression and yet so weak in terms of shearing. You could say there are no natural weak-points between crystals for an impact to break along, or that the space between every minute crystal is just as likely to break as the next. So instead of shattering wildly the structure breaks in exactly the way that it distributes the force. Naturally, any impact causes energy to radiate out in circular waves from the point of contact, so the glass fractures along these waves. They look like ripples in water, because that is pretty much what they are - ripples of energy that caused the tiny particles to shear far enough apart that they separated from one another. In the case of the spheres however, the waves of energy bounce around inside the sphere itself, causing many of these waves to be sent flying around in all directions (which you can actually see as reverberations in the slowmo). As they collide with each other, some cancel each other out and some magnify each other, depending on how they meet. The cone shape is caused by the waves radiating out around the surface of the sphere, and then meeting again at the same point. The glass at the exact impact point is still compressed, so instead of breaking there, the waves bounce off of each other again, at an angle roughly 45 degrees to the plane of the surface. This forms the characteristic cone. When the sides of the cone reach the surface of the glass again, the waves release their energy through the path of least resistance, which is up through the surface of the sphere, shattering everything below that point andoutside the 45 degree plane, leaving behind the cone. tl;dr - the structure of the glass allows it to propagate the waves of energy from the impact very well. The cone is caused by these bouncing off of each other and the surface. Extra fact: because the crystals are so tiny, there is no roughness to blunt an edge where two fractures meet, and thus they form an almost molecule-perfect edge. This is why obsidian and glass are so incredibly sharp when they break.

4:00 First Drop(?) 4:55 Second drop 6:13 Third drop 6:35 (it's called a conchoidal fracture) 8:48 Forth drop 10:08 Fifth drop 11:12 Sixth drop 12:50 Seventh drop 14:45 Eighth drop 15:49 Ninth drop

The secret to these glass balls is that there is no grain like tat in rocks or wood. The balls are also annealed in a way as to temper them so they won't fracture. That is why you got that cone effect when they hit the plate!

I love the interactions in these. No cursing, no horrible pranks against each other, but still VERY entertaining. Good on ya, fellows! I hope you filled up on KFC after all this

I learned a thing or 2 from SmarterEveryDay. When he shot a 9mm bullet toward acrylic. The middle was not fractured at all, but the area around it was shattered. He called it frustum. It is where stress is not transferred through an object like a cylinder but it is transferred through a pressure cone. Thank you SmarterEveryDay for making me smarter. #smartereveryday

The light being focused so clearly through the shards of broken glass at 8:09 is one of the raddest things I've ever seen on this channel. How good.

You guys are great! Got to this vid late but I can give my Gaunson style explanation. At impact there is a "wave" in the glass angled at 45 deg. It propagates so fast through glass that the glass acts like a liquid which forms the "wavies". Once they reach the limit of the edge the reflection tries to come back which pulls all the glass off the surface. 🖐😃👍

Pure joy from start to finish !

I can't say I'm an expert in coney-joneology but I believe it's caused by the way glass compresses. Glass is a strong, but brittle material, meaning it can withstand a lot of force but breaks quickly (compared to metals, which bend and deform). When it hits the plate, the point of impact gets squished in, and the glass around it has to follow due to the strong bonds. But because the compression strength (squishing ability) is stronger than the tensile strength (stretching ability) the area around the point of impact can't handle the stress of stretching, and shatters. The ring around the point of impact is what makes it look like a cone. Hope this helps explain things simply!

The actual scientific answer is that *it breaks in a similar way every time because of the way the glass was cooled. Much like a Prince Rubert's Drop, the glass is cooled rapidly; creating a compressed center, and a shell that can sheer off after the impact. The molecular structure of the glass is like layers or shells, so only the outermost layer breaks off of the ball instead of it shattering throughout the whole ball.

That was such a beautiful, specific Parks & Recreation reference. Shout out to the greatest board game ever created during a massive depressive episode.

Watching the glass ball falling in slow motion reminds me of a drop of rain falling from a storm cloud.

In case anyone was wondering, the 40kg glass ball: Falls for 3.03 seconds Reaches a speed of 106 km/h before impact Hit the steel plate with a force of 392.266 N (88.1849 lbf) EDIT: Thank you to MechanicalMind7. The force listed above is just the average impact force. The peak impact force (the one you'd feel if hit in the head) is actually close to 1,765.17 kN or 396826 lbf, assuming the steel plate had a 2 cm give.

For brittle materials like glass, they break in a shape known as a "frustrum" (which is essentially a cone with the tip cut off) centered at the point of impact, which is exactly what you see here! Source: Mechanical Engineering Student

That shatters a whole, new world of possibilities.

them making fire made my day bc it reminded me so much of myself and i realised that i am not alone in a world of silliness and dumb ideas such as these, but i share it with my favourite content creators on the planet, thanks boys, i hope i can meet ya one day

It's a retinal pressure cone caused by small surface area contact combined with the Amorphis microscopic molecular structure of the glass resulting in a conchoidal fracture pattern. I knew that off the top of my head because of RU-vid . RU-vid rules.

They should definitely drop the hulk fist on one of the glass orbs.

it has likely been mentioned but, the reason the ball doesn't shatter more, the higher you bring it is because from the first drop at the halfway point with the first medium ball, is because it already hit its terminal velocity, meaning no matter the high past that point at most. The speed is the same, meaning its force of impact will also be the same.

The fact it doesn't shatter raises the question,how far must it fall to completely explode =0

Ball drop # 1- 4:56 2- 6:16 3- 8:51 4- 10:10 5- 11:13 6- 12:53 7- 14:47 8- 15:52

The shape is called a concoidal ... It's a fracture of silica molecules which makes the glass .... Also when the glass hits the steel plate ... The impulse created makes the wave patterned fractures which in turn explain Newton's 3rd law at the point of contact nothing happens... But the impulse travels in the form of waves and is the force is not conserved anywhere else but the point of contact , the cone is formed ... (Comtest).. thank you ❤️

“But balls are strong I think” Brett you make my day

That slowies are incredible. The ripple effect from the cone are awesome!!

As a retired glass maker, you make these in layers, like as onion. Also it is leaded crystal which is 60% by weight dissolved lead, giving it the optical quality. A crack will always travel the path of least resistance, ie the thinnest, so upon impact the cracks will propagate in 45 degree angles, the waves are the onion layers exposed.

The "Coney Joney" is actually an incomplete manifestation of the Bell Effect. A subsequent drop with the impact at the exact same location and angle would complete the effect, distributing the force through the rest of the bell curve, creating a bell shape and serving as a reminder for us to GET THE BELL ON.

I love watching y’all drop stuff from the tower!!!! It makes my day & honestly I wasn’t having a very good one today!!! Thanks!!!!!

Glass forms in layers. When the end result is a sphere, there are multiple spheres below (inside). The strongest part, is the thickest (minimal damage). A few layers “ slough” off from the kinetic energy, but only off of the bottom. The layers on top, have support below them. All just a guess

Smarter Every Day actually kinda explained why it breaks that way. Stress propagates through the glass in a shape called a fructum, which is basically a cone with the point cut off. That cone gets wider until it intersects the edge of the ball, and everything on the wrong side of that stress line is what breaks off.

Shoutout to editor Jack who runs even when he's 3 feet away from the camera.

The fact that youcan see the shockwave propagate through the ball is amazing. You could almost liken it to seismography. How an earthquake that is big enough will be heard around the globe.

"I mean, I can see the sun when I close my eyes now," just as an aside. Great comment, and great content. Cheers!

It’s called a “conchoidal fracturing”, and occurs in glass and glass like rocks. It’s one of the key indicators archaeologists use to identify stone tools and tool scraps. When the force of the strike moves through the glass, depending on the angle and force, the fracture absorbs much of the force (you can see that in the ripples left on the new surface of the glass) allowing for precise shaping. Basically, glass + force = conchoidal fracture. Plz pin

Can we just take a moment to appreciate how good of aim they have.

If you look at the shape of the bowling ball from a similar angle you can see the same cone-like shape. It's just that the bowling ball only has a few thicker layers, instead of the glass with all the thinner layers.

When the glass ball is rolling it looks so trippy it doesn't even look like it is spinning

LMAOOOO, okay now I fully understand this tweet made by Anthony Oliveira: when i bought my giant crystal ball the lady looked me in the eye and said "whatever you do, never EVER leave it uncovered when youre not home" and i said "oh wow because of spirits?" and she said "what? no bc if the sun hits it weird it'll burn down your house"

As the glass impacts, the point of impact supports the glass above, however there's a shear plane that can't withstand the excess force (the triangular shape from the side view) where the material below the fracture line isn't supported, so below that line is shearing due to tensile stress (the glass below the triangular shape being pulled away from the supported glass fracture line above) on the glass, the fact that the "Coney Joney" is uneven is likely due to the force being applied having a lateral (forward) vector, meaning there's more force being applied to one side than the other, causing more shearing to occur on one side as opposed to the other, so if you drop these directly down you'd likely see an even "Coney Joney". It's likely the front is shearing more as the force has a greater/higher forward motion (which is also translating to a higher stress on impact/stopping motion) so more of the front lower section is shearing as opposed to the rear, so more at the front less at the back. I hope i made this clear enough to understand! You could also likely review the slow motion footage to confirm/debunk the lateral force causing the un-even "Coney Joney". To eliminate the "Coney Joney" effect you'd likely need to surpass the compression strength of the glass itself upon impact where the whole glass ball would likely either shatter, split or a mix of both (maybe turn into dust/tons of tiny shards. This force may be too high to overcome from dropping from Terminal Velocity of the glass balls... maybe look into it? =D As for the waves the most reasonable explanation i can think of is that it's due to the cooling process tempering the glass different amounts at different depths for some reason. Really quite some interesting physics/science/engineering phenomena!

& thus, the Coney Joney was born, Rexy got a tat, & the yelling at each other to communicate came back, this viddy was an important one in HR history.

The ant burner 9000 lmao 😂😂😂😂😂😂

the bit at the beginning where he keeps thinking he's getting bit by a bug is so great. not just because of the reaction, but how they go ahead and test out ideas for how to explain it immediately.

15:50 it kinda does... your welcome

there's a reason why crystal ball sellers give the warning of "when you're not home cover the crystal ball", not because of some mystic ideas or paranoia, but because the light hitting it through a window would set your house on fire

Wild slow motion shots!

In engineering, there are two types of stresses that a material can experience: axial stress (tension and compression) and shear stress. These two types of stress are related to each other using an engineering construct called Mohr's Circle. Basically, when a material is loaded, there exists an angle where there is no shear stress (called the principal planes), and 45 degrees from the principal planes is the angle of the maximum shear stress. You can see this in concrete loading tests (unconfined compression test). A concrete cylinder is compressed until it fails. These cylinders usually have a shear failure, and the crack that forms is usually on the diagonal. Glass is strong in compression and shear, but is weak in tension. When the glass hits the steel plate, the kinetic energy is transferred from the glass to the steel plate, and ultimately into the ground. Any portion of the glass ball that can transfer this energy with compressive stress or shear stress does not break, but the portion of the ball that transfers its energy with tensile stress shatters. The cone shape comes roughly from the angle of the principal planes (assuming an isotropic material), which delineates the glass is supported in shear/compression from the glass that is only supported in tension.

If you watch to the right side of the sphere from about 8:08-8:18 you can see the focal point of the light. This is what kept burning them. It is really cool to see the focal point emphasized by all of the glass fragments. TBH I did not see this the first 6 or 7 times I have seen this video. :-)

in the slow-mo for the last sphere a shockwave can be seen traveling around the sphere

As a graduate of Gaunson school of science, the congulei-gai-nurei effect occurs because the glass is made of sand and sand is found on the earth, and the sand is heated a lot to become like lava in a volcano to form the glass ball. Thus when the ball hits the ground, its like a human being hitting their head to remember something, so the glass ball remembers that time it was super hot like a volcano, and forms that volcano shape from its memory. Each volcano formed is different to each glass ball like a snowflake.

The cones are happening due to your position south of the equator. Here in America the cones are on the other side of the ball.

An idea for some videos. Build a massive trebuchet and launch stuff with it. Our local school system once had a surplus of old upright pianos and I suggested launching flaming pianos at every football match. The idea didn't take, but dang, I think a flaming piano launch onto a hard field with Rex there would still be quite the spectacle. Think of the bonus launches of watermelons, Bruce, band balls, all the darts at once, 1000 throwing knives at exercise balls...the spiky ball at a bus...over to you lads. Thanks for all you do and the witness of family friendly yelling.

0:21 LMAO this ball got me confused xd I thought it was ahead of his head, but then he started talking... xD

i believe its called the "Death Star Effect", where a sphere just looks cooler missing a part of it

15:49 is what you came for.

The coney-joney is everything 🙌😂😂

It's 2022, and yes. The Coney-Joney effect is mentioned a lot in our science textbooks. All scientists and physists are discussing this matter.

We need a Slow Mo Guys version of this! Imagine how spectacular the shattering would be in super slow mo!!!

8:15 look at the sun-"laser" in the slow motion segment. Thats just wild.

As much as I love this show.. I was laughing so hard in the beginning when I saw him burning himself, and he had no idea why? I knew it was going to happen… 😂😂😂😂😂

Did some quick maths on the biggest ball drop using your figures of 40m and 40kg drop to work out the final energy output of the heaviest glass ball when it collided. assuming the energy wastage is minimal, it produced about 15 and a half kilojoules of energy, which (if it were in the form of electrical energy) would be enough to power an LED lightbulb for almost half an hour!

Comtest: When the glass ball hits the steel the shock waves travel down the ball getting wider creating coney Joney. Then they aren't strong enough to break the glass and that is why the rest of the ball is still intact.

Cause of the Coney Joney: it is caused because the glass is more resistant to compressive force then it is to pulling force. What happens is on that small point of impact the glass compresses while on the surrounding glass not in contact with the metal plate the momentum of the glass causes a pulling force. this causes conchoidal fracturing in that particular way that makes the cone.

Nice video! I am not sure this is good advice, but if your steel plate is bent it might be better to flip it upside down, so you don't get a "lever" effect when the dropped items hit off center...

I love the beginning of him jumping each time thinking he was being stung by something and he was literally being burned by the sun lol 😂

00:26 the sun rays that traveled thru the ball burned him. The ole' "magnifying glass" trick

*Me learning about the fracturing of glass in school:* Hey that’s a Coney Joney!! *Teacher:* ...

11:58 I can confirm, I am teaching the vocab word "Coney-Joney" to my high school students in 2022

“Do I just get bit?” Proceeds to start making fires. 😂😂

*Says in a nerdy voice* According to my calculations the coney joney occurs when a fragile item that is layered (example glass) and is dropped from a reasonable distance. How this happens is the impact zone acts like obleck, ready for impact, it then sends a shockwave which then distributes the layers away from the sphere. The reason why the shockwave occurs is because when the ball makes contact, the impact zone absorbs the energy and its got all this energy with no where to go so it sends it self at a ten degree angle going to the impact zone and the energy continues to move down the layers until it inevitably runs out of energy. The reason the first two impact zones were off to the side are because they had forward movement and that made the distribution of energy go more forward. Think of doing a canonball at a pool, you move forward and that causes the water impact to move forward and out of the way, same concept. When you just dropped them with no forward motion, the peak of the cone was more in the middle but was not direct because the ball was spinning a little and the baseplate was not flat.

The Coney Joney Effect: Scientific Term- When a spherical object collides with another object where only a single point makes contact, the energy is transferred back through the sphere in a cone shape. Thus anything outside of this conic region is unsupported, and due to its inertia will shear off of the rest of the sphere. This phenomena will result in a hemisphere with a conic end. Here is a diagram I drew up: imgur.com/gallery/BbxiDsu Disclaimer: (I don't know if any of this is true I was just guessing)

2:18 since y’all are in australia it’s actually right side up, so you’re seeing how it’s like to see things everywhere else

Yall making me laugh with the burning 🔥 through the glass balls hahahaha the hole in his shirt 👕 😂 🤣

I think we need a Smarter Every Day and How Ridiculous collaboration to figure this one out...

Its called conchoidal fracturing - source: Geology student.

Never fails. Doesn’t matter what youtube black hole I fall into, I always end up here. Today I started with Brandon Herrera, watched multiple genre related videos, and still landed on How Ridiculous. Not mad, just sayin 🤷🏼‍♂️😂👍

Because it's a shock wave and it resonates at the same frequency as the glass however it does not have enough shock wave for completion and thus the shape of the breakage. Also some of the shock is absorbed by the soft ground underneath which also affects the resonation so next time drop it onto something solid and you will find the effects to be substantially deferred.

2nd time stamp for SloMo if there's some time in between Small Ball 4:55 Medium Ball 6:15 - 7:50 From the Top: Bowling Ball 8:50 Concrete Ball 10:10 Small Ball 11:10 - 12:00 Medium Ball 12:50 Trampoline 14:45 Big Ball 15:50 - 16:45

G'day, Well, Pilgrims... The Word is "SPALLING..." The Compression-Wave generated by the Impact tears the Skin off the Central Mass of the Globe, and the Skin shatters into Sharp Flakes. Spearheads and Knife Blades are made of Obsidian and Flint, using a similar mechanism, flaking the material away one bit at a time using concentrated pressure onto one spot, applied with a piece of Hardwood or Antler. Just(ifiably) sayin'. ;-p Ciao !

“Balls are strong” got me cracking uuuuuuuup

The inertia from the outer edge keeps putting force on the edge of the impact spot, causing the edges to fall of instead of the impact spot cracking.

The coney joney is a result of point loading the sphere upon impact. “The dynamic compression processes can be divided into three stages, e.g.the quasi-elastic deformation stage, the non-linear deformation stage,and the brittle failure stage. The plane-like fronts and the shadow areas (crushed/ brittle failure region) are observed in the spheres. At the brittle failure stage, the movement of the plane-like fronts stops gradually, and macro radial cracks around the edges of shadow areas nucleate and coalesce along the impact direction. The shadow areas and these radial cracks are the causesof the catastrophic failure.” - Junfang Shan, et al, Dynamic Breakage of Glass Sphere Subjected to Impact Loading (2018)

Rexy is the most fearless warrior / mad scientist in our world