Dominoes - HARDCORE Mode - Smarter Every Day 182

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3Blue1Brown
/ @3blue1brown
Slow Motion Sound, Ambiance and musicy things by: Gordon McGladdery did the outro music the video.
ashellinthepit.bandcamp.com/
Dominoes Provided by:
bulkdominoes.com/
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I expected the hardwood to be faster than the felt because the rotational moment of inertia when spinning around the center is 1/4th that of tipping on the edge. I was wrong in this case, but I'm wondering if this would hold true on glass?
THANK YOU EVERYONE who helped reduce the data! Names at bottom of this description. Follow the SED subreddit and other stuff if you want to help with stuff like this in the future. Here's the link and spreadsheet to see how we did this:
/ smarter_every_day_domi...
Rotational Inertia of falling dominoes can be calculated with this.
en.wikipedia.org/wiki/Paralle...
There are several papers on dominoes out there... but none really touched on the stuff I'm talking about in this video. Please feel free to point me to sources if you've found them.
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I'd like the thank everyone who follows me and especially those who helped process the data (names at bottom)
Smarter Every Day on Patreon
/ smartereveryday
~~~~~~~~~~~~~~~~~~~~
THANK YOU to the following folks who helped process the data names below!
(See the data here:
r/physics
GH, Blitz, Kelly F., Ruvi L, Kelly F., Andrés L., Andrés Lit., Austin , Kelly F., Ely, Blitz, Blitz, Nathan Graves,
r/SmarterEveryDay
Leo G, Simon Zhang, Bryan Habas, Bryan Habas, Austin Hermle, Thomas Kempf, ZachPruehs, Zach Wiggin, Matt Hackett, Maurice Fahn, Felix Maas, Alan B, Scott W, Andrew W, CM. Au Yong, André vD, Jacob Pierson, Felix Maas, CM. Au Yong, Dan Whettam, CM. Au Yong,
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Patrick Ford, Patrick Ford, Tom Haake, Heather Deter, Nathan Samchek, Kit Komarov, Nathaniel Leung, Daniel Johnson, Luke Israelson, Patrick Ford, Zach Banks, Jay Anderson, Mark Brouwer, Mark Brouwer, Tom Haake, Andrew I. Young, Austin Burnham, Mark Ellis,
Facebook
Ben Heckard, Jeff Steiner, Martin Licko, Seyyed Ali Hedayat Mofidi, Jacob Brausch, Jonathan Baston, Eyal Dayan, Daniel Hardy, James Reardon, Leonardo Garcia, Ryan Crowley, Asad Mirza, Ben Perry, Caleb Crow, Joe Schey, Flo Hörtnagl (@fhoertnagl), Ben Martens, Andrew Hawcroft, Seyyed Ali Hedayat Mofidi, Mathieu MacAdam,
Twitter
Humaid Mustajab, Andrew Afflitto, James Frazier, Dustin Ybarra, Arthur Scott, Andrew Mleczko, Calvin Franz, Josh Sheldon, Todd Gallant (@galtomasum), Anthony Rovegno,Daniel Bethel (@SpiderRobotMan), Graham Allen, Kevin Schwarz, S. E. Vidrio, Will Slack, S. E. Vidrio, Pat Bigelow, Nate Thompson, Grant Hoover, Chris Carey, Steve Brand, Robert Beck, Robert Morgan
r/NDQ
Taxikab96, Wilda666, MrThursty, Christopher Britten, Kyle Pham, rafasc, HooliganTim, Grant Peter, nickleplated, Kyle Pham, Tommy Smith, Tommy Smith, Chris Allen, Georges Jaar,
Snapchat/Instagram
Noah C., Nathan K, Hunter B., Wyatt Wheeler, Hundter Biede, Alex Truax, Hundter Biede, Alex Price, Piotr Grzegorczyk, Andrew Lit, Sven Weihe, David Ruscalleda, Rory Semple, Max Kissen, Caleb Knight, Nathan Pak, Ben Kratz, Derek Haas,
Also, thank you to my Church, First Bible Church of Decatur, Alabama for the use of the gym over 2 days. fbc.org/
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The thought is it my efforts making videos will help educate the world as a whole, and one day generate enough revenue to pay for my kids college education. Until then if you appreciate what you've learned in this video and the effort that went in to it, please SHARE THE VIDEO!
If you REALLY liked it, feel free to pitch a few dollars Smarter Every Day by becoming a Patron.
/ smartereveryday
Warm Regards,
Destin
#smartereveryday
#slowmotion
#Dominoes

[@3blue1brown]

What a surprisingly fascinating topic!

[@beqaotarashvili9341]

youtube is drunk . video uploaded min ago and your coment is posted 6 min ago XD btw love your hanel to

[@DagaraLP]

Indeed

[@kichi7943]

Ikr this is AWESOME!

[@hlfan]

3Blue1Brown and a fascinating twist!

[@sansamman4619]

I think the twist should be because of the human pushing the first domino with inconsistency which makes the graph inconsistent

[@BobbyDukeArts]

You really have a gift man. You can take something as seemingly mundane as Domino physics and make it incredibly interesting.

[@davidacus956]

Bobby Duke Arts To be fair, I don't think I'd say Destin is making it interesting. I'd say they are interesting inherently, and Destin's gift is exposing the interesting things in seemingly mundane phenomena

[@BobbyDukeArts]

David Wendl touche

[@smartereveryday]

I appreciate your mutual appreciation in the beautiful.

[@raptor13]

it's like riding a bike

[@oliverturner1649]

Almost like how astronauts can make fluid dynamics engaging to children... funny that. (i still think you'd make a great astronaut, if you couldn't tell)

[@RaindropsBleeding]

"the physics subreddit wasn't interested in doing physics that day" Everyone wants to be a scientist until it's time to do sciency things.

[@anothrto1045]

Shoulda taken it to theydidthemath more physics minded there.

[@RaindropsBleeding]

@J Sev absolutely XD

[@_TopG]

Everyone on Reddit are all talk

[@AlmightyGatsby]

@@_TopG Found The Guy Who Gets Bullied On Reddit

[@ohno.6516]

@@AlmightyGatsby Found The Guy That Found The Guy Who Gets Bullied On Reddit.

[@jamma246]

0:11 _"Animals squirting things... whatever you're into"_ He's on to me.

[@willmarine1287]

( ͡° ͜ʖ ͡°)

[@user-qc6wm1bs6p]

@@willmarine1287 5720662283683376805725056894222795286587978511845269358725056894222795286725056894222795286587978511845269358725056894222795286587978511845269358725056894222795286587978511845269358725056894222795286725056894222795286725056894222795286587978511845269358725056894222795286587978511845269358

[@robertunderwood1011]

@@user-qc6wm1bs6p what's this number?

[@user-qc6wm1bs6p]

@@robertunderwood1011 its just a spam

[@cedricsturm5131]

@@user-qc6wm1bs6p Nice

[@TimJSwan]

Lol. "They told me I could assume a cow is a sphere in a vacuum."

[@wesleymercer4536]

This confused me greatly 😂😂

[@greatestgrasshopper9210]

@@wesleymercer4536 it's an analogy about how the equations in physics are designed for ideal situations. Such as no erratic particles like air, and a sphere always bounces predictably.

[@iquemedia]

Little do we know, Destin is actually getting closer and closer to faster than light travel with this reseach

[@emersonvae]

lel

[@FLOABName]

i say he has already achieved faster than light travel. That or mastered cloning. It is the only way he can do all the things he does

[@joskarifinaukr6503]

That's easy. We just need to trick the Universe into thinking the distance we want to travel is shorter than it actually is.

[@Triumvirate888]

You don't want to go faster than light. You'd be going faster than the electrons orbiting around the atoms in your body, so they'd all just trail behind you like a lightning bolt and the atomic structure of your body would collapse into stray protons and neutrons with nothing to bind them or hold them together, and you'd just vanish into energy and atomic dust.

[@toquelau5715]

What a beautiful way to die.

[@electronash]

"Next week, we put a cow into a high vacuum, to see if it will turn into a sphere."

[@GetHighWithMeHOE]

Hey destin, I don’t know if you’re going to see this or not.. but I just wanted to say for the last couple years of my life I was in a bad place and was using drugs to number the pain temporarily.. thank I’m god I’m doing a lot better now and I’m start school this fall to become a mechanical engineer! I just wanted to tell you during that time I would always watch your videos and they were on of the few things that made me happy! Keep on doing what you’re doing, and I love that there on people like you on this earth!!!

[@HyatusPK]

12:57 *HEY VSAUCE, MICHAEL HERE!*

[@AA-Ashley]

lol

[@randomfangirlqueen]

ussilunaticpizza 😂😂😂

[@ryun_d3v]

lol!

[@vampyricon7026]

+

[@masterimbecile]

Hey VSauce, Michael here! What is ?

[@aaronmoore4147]

“Welcome to try hard mode, it’s the same as before only I try harder.” 😂😂 that’s the best quote on this channel

[@nicht4041]

Hard core mode*

[@SamSam-yf2xj]

You're favorite quote yet you got it wrong?

[@ashleyhoman2592]

I agree with you!

[@Stephen_Loves_You]

Wow you suck

[@forestbroz4549]

@@SamSam-yf2xj its the same thing so you shouldve chilled out, haha this is 10 months ago. still hard core and tryhard is basicly the same meaning, symonyms brutha

[@von6593]

10:54 Hayden didn’t like how it stopped💀

[@okeen5265]

Understandable. Something about this dude tells me he's extremely annoying to work with..

[@jacobshirley3457]

@@okeen5265 That's a weird interpretation of her reaction.

[@blockparty5695]

I’m sure I speak for all domino artists/builders when I say I absolutely love this video. The physics involved with domino toppling go so much deeper. One of the main reasons I love it so much! Thank you for doing this video Destin!

[@fdcarIi]

"Welcome to Hardcore Mode! It's the same as before, only i try harder." I love your honesty xD

[@Hevesh5]

Who knew that little blocks of plastic could leave us so puzzled?! Watching the slow mo of each domino slightly rotating at the moment of contact with the next one is super interesting. I never thought about that phenomenon to this extent, but that does explain the fluctuating velocity... another fascinating topic. Excellent video, Destin!!

[@RobbieIsbell]

Stuff like this is why I watch videos on KZbin.

[@Epictastick]

I love you your vids

[@Shrimp-ov8jz]

Hevesh5 YESSSSS ITS MY GIRL HEVESH I FINALY FOUND A COMMENT ON A DIFFERENT VIDEO OMG I LOVE YOU I LOVE YOUR DOMINOES AHHHHHHHHHHHHHHHHH

[@jasonwills1116]

Hevesh5 nnthatwasonofthethingsthatanoyedmeinmathshowyoucanassumethings, i asumeinotheanswer.

[@dummypg6129]

Thats because people tends to think about themselves only.

[@sabastianlove1286]

nailed that half-court shot.

[@elliottcason4673]

Destin, your channel is awesome. Thank you for all you do. I thoroughly enjoy it.

[@3dpprofessor]

"Millions saw the apple fall, but Newton was the one who asked why." -Bernard Baruch

[@ChristmasTurki]

Doubt millions were there big boy

[@pvarls7233]

thechristmasturki He doesn’t mean that specific apple big boy. He means many experienced what Newton had but only Newton asked himself why.

[@Crazyoldman84]

Now some say gravity doesn't exist.

[@IntellectualKetchup]

Unfortunately, gravity is still a mystery and as a whole has not been proven to be fact. Science advancement in physics has been held back compared to many other sciences, because so much is based on guesswork that has never been proven via experimentation. Most people don't know that we have never actually seen inside an atom, and since we don't have the ability to travel into "outer space", everything there is all unproven theory as well. In fact, as Michio Kaku said, it is the biggest disconnect between theory and scientific experimentation, in the history of mankind. The fact that the Earth's movement has never been proven, and there are so many actual scientific experiments that prove the opposite, makes me wonder why academia can't get their head out of their arses. It is ok to admit that you have no clue how this realm works. If all of mankind was aware of the fact that we live inside a realm, with a flat plane at the center, science could make some great advancements. I recommend watching the Primer Fields series on youtube. Also watch, Flat earth is Scientific and the Globe is not, by the Mr Astrotheology channel.

[@pvarls7233]

Intellectual Ketchup gravity has been proven via experimentation. I do agree that most things are theoretical and not facts but to say that nothing has been proven is just a lie.

[@kylesmorgabord5592]

Destin, your video topics are consistently more engaging than anything on KZbin! Love your perspectives.

[@CRDSWORLD]

exactly what i was thinking as i was about to go look for something to watch now that this has ended. /cry

[@chubacca7666]

I’m constantly saying he is the best KZbin Channel

[@jamma246]

_"Destin, your video topics are consistently more engaging than anything on KZbin!"_ But his videos are on KZbin.

[@tgxnothing5766]

0:46 "I don't understand dominoes" I was like: the pizza company or dominoes the game

[@EthanDoesRandomStuff]

I was like that too.

[@kasten8108]

Your positivity and laugh makes me smile this is awesome 👏🏼

[@physicsgirl]

HAH! I like hardcore mode Destin.

[@sweeflyboy]

First to comment on one of my yotube idols! Hi Diana!

[@jakekaim03]

kinky

[@kamael]

Question: how the girl pushes the first domino affects how the other dominoes twist and topple, right?

[@aniksamiurrahman6365]

Best comment of this video. One of the best science video question I've seen.

[@TheCgOrion]

Absolutely. Not just in how it twists, or the bottom shifts, but the amount of energy she adds into the system, completely changes how each interaction reacts.

[@sreramk1494]

True, but even if you are very careful about how you push the dominoes, the part of the energy that gets transferred to the twists from the translatory motion depends on factors like the roughness of the surface the dominoes are placed (for example, if the left side of a single domino is more rough than the right side, then it is more likely to twist from right to left, anti-clockwise). For some reason, the energy from the twists start to transfer to the translatory motion, and this oscillates back and fourth. It does depend on how it was pushed, but the outcome cannot be predicted with just that. There are millions of other variables involved, which eventually obscures the initial conditions to the extent that it cannot be traced back. Thus, regardless of the initial conditions, the outcome will always be random. That's why it is "chaotic".

[@bclamore]

Yes, the initial push is a variable. But, as mentioned in the video, the system has a self-regulating behavior, which tends to limit the significance of the initial conditions.

[@NotSoFast71]

Yes, but also the microscopic amounts of misalignment from one domino to the next.

[@Kevin-wo3kp]

This is the first video of Destin's that I've seen and watched. What an intro! I've got a lot if catching up to do! Thanks for all your hard work and effort to share and to others who help make it possible.

[@AnonMedic]

This video makes me appreciate your sound guys quality of work.

[@AndyShelton1]

I rarely finish watching your videos anymore, not because I don't enjoy them, but because in the middle of your videos you keep recommending such wonderful other KZbin channels that suck me into their black holes of learning. You teach a lot in your videos, the quality connections you make for us among the academic elite on KZbin and elsewhere extend that learning immeasurably further. Thank you for what you do, Destin. Never stop.

[@letugianghuynh8616]

I argee, a lot of information :V

[@letugianghuynh8616]

but it's good and he is wonderfull

[@deadsi]

One criticism, he's a bit smug smieszne

[@lma.community3904]

the legend tells us that if you know the secret about Dominoes, you become CEO of domino's pizza.

[@georgea.hickeyjr.3832]

I always thought that was a myth

[@tommo123456789000000]

they want you to think that. it's to discourage people competing for the prize of free pizza

[@journeytothecenterofnothin7782]

What is this Destin?

[@lma.community3904]

it's a fake.

[@user-ht3tp3uj4v]

this reminds me the simpsons ..

[@AmanBansil]

You're so good at this. I love the Engineer's mindset, where they want to understand why something works. Very nice video.

[@jamesstainus]

I've watched quite a few SmarterEveryDay videos, but this one earned my subscription. Great work, incredible insights.

[@flobb91]

i love slowmo footage. but i like it even more when the sounddesign is a perfect match. nice job!

[@zengrath]

I was impressed by the sound effects in the slowmo too!

[@turksandwich7538]

Forgive my ignorance, but is the sound actually from the footage or are they adding it in during post production?

[@flobb91]

most slowmotion cameras dont record sound. it is added later. the fact that someone found the perfect sound and put that neatly on every collision is just awesome.

[@NickHorvath]

Subscribed years ago because of slow motion bullets... Stuck around for EXACTLY THIS KIND OF STUFF! Keep it up Destin!

[@Macadoof]

Absolutely amazing video. So simple, yet so complex. I'll definitely apply the "Ask the simple questions" line more in my life. Thanks Destin

[@ericx777]

"There's a fine line between madness and genius... sometimes, it's dependent on the end-result"

[@hammerslap5639]

I am wondering if you tighten up a few controllable variables you may improve some of the predictability and get some tighter numbers. 1. You are initiating the dominoes with a flat sided ruler pushed by hand. This could easily cause variables in the initial rotation of the dominoes and could introduce a more pronounced wave in the pattern of "rotating" dominoes to the "slam" dominoes. Doing it by hand could also introduce a greater or lesser initial momentum that gets carried through the whole set. Maybe initiate the dominoes with something like a spring fired pin that strikes the initial domino it the same spot and at the same speed every time. 2. Surface variables - For the hard wood there are going to be many variations from board to board that could possible effect results from run to run. Differences in grip from board to board, wood grains, the small gaps between boards. Looking at your graphs you see a moment where the hard wood actually accelerates to a speed greater than the felt before correcting back down. might be from a slightly higher traction on 1 board before correcting back down on a more slippery board. Felt can have an entire set of its own differences that could effect the dominoes on the other side. I'm thinking something like a long piece of class would be a good surface to do the "slick surface test" and possibly a long strip of rubber mat would be good for the "High Traction" test. 3. For ultimate comparison, I remember they used to have domino sets where it was plastic rails that each had 10 or so dominoes affixed, I think they are called pivot track dominoes... you would place these tracks of dominoes end to end to make your full run. You would have a run where every domino was in the exact same order facing the exact same direction running on a "constant fricktion surface". A good run of these affixed to a board to ensure consistent spacing between tracks, fired with a pin to ensure exact starting velocity, should give a somewhat "variable-less" run and may show once and for all if you can or can't predict the fall speed of a particular run of dominoes. In either case, I love domino videos and I love your videos so maybe I am just being picky so I can see you make more domino videos.

[@theHOONeybadger]

I am going to "BUMP" this comment, because questions 1 and 2 are exactly what I was thinking. 1 - I do however think the flat push approach would work better, just automated with the same timing and pressure each time. If you had a pin point push, it would have to hit precisely in the middle (side to side), or it could initiate a twist right away. 2 - especially on a basketball court, the slickness of the court could be vastly different if you set one domino on say, a shoe scuff mark for example. I was wondering how clean the surface is, as well as how smooth it is. With wood, you can always get variances in the surface smoothness (whether it be the varnish, or the wood itself warping slightly), and since we are talking in such a minute scale, this could affect the outcome. I like the piece of glass idea for a more consistent surface texture. Thanks Hammerslap for typing most of what I wanted to say, haha!

[@Matthew_6.33]

Up vote this comment. I totally agree :)

[@andreaskerscher235]

I also totaly agree on reducing the variables. But using affixed dominos would be something completely different, because they are not able to slip at the bottom. I agree that it would be good for a comparison because they can not twist either. So they should - in theory - fall at a constant speed after an acceleration phase.

[@hammerslap5639]

using the affixed dominoes would eliminate the "slippage" variable. which would help us know if the fall is consistent from run to run. once we see that it is reasonably predictable that way we can prove predictable deviation based on surface.

[@andreaskerscher235]

Oh, I get your point. You're right. I hope Destin sees your suggestions!

[@fernandoschuindt1665]

4:55 I can imagine your sound effects friend hitting stuff in his kitchen now that I know how he does

[@ItsJustGilly]

Fernando Schuindt exactly lmao

[@asdf52708]

hahaha, i literally thought the same thing when i watched it!! whoever it is is great at it!!

[@Charlielizard]

Phenomenal! The identification of the "twist effect" along with gripping and sliding was not something I would have expected to see. Thanks!

[@gelfrog93]

Thank you for making a point about the importance of 'silly' questions. I get so many people at work being unsure and apologising for asking asking such questions but I completely agree with you; these are the important questions to ask to understand what is really going on around you.

[@turboglock]

We at bulk dominoes are loving your videos. We have had many conversations as to if are heavier dominoes (clear) are faster falling that the lighter dominoes (solid).

[@smartereveryday]

Awesome! Thanks for giving me the dominoes for this video! www.bulkdominoes.com

[@suoicipsuS]

hmm

[@ohforsuredudee]

Duuude

[@jasonallen3749]

I'm pretty sure the clear dominoes would fall faster. The guy from 3brown1blue already showed us the data explaining how dominoes on felt generally fall faster than dominoes on wood, so from they we can conclude that a higher force of friction between the dining and the floor results in a greater velocity. Friction forces are also directly proportional to the weight of an object, so the heavier domino should have more friction, therefore falling faster

[@gabrielf8094]

Why is no one talking about 3:47? That is SO badass!

[@Zyrkseas]

cause he had all day to try and try and try and try till he nailed it. You could probably do it too with a few hours to kill if you have the strength to throw the ball that far.

[@LucaS-tf2sj]

Haters would say it’s fake😂😂

[@jenky1044]

@@Zyrkseas We used to make quite a few at half court, after you get everything dialed in. (1out of 3 -4). But it was facing forward and your feet couldn't leave the floor. But never backwards. I think that's pretty cool indeed. I was trying to figure out why they needed a gym to set up 2 dozen dominoes. 🤔. I was thinking cafeteria and one table.

[@riddle9064]

@@jenky1044 I believe using the polished gym floor was a better choice then a cafe table that was probably at most cleaned with a wet towel if cleaned at all. Plus the privacy for recording in a gym that may be closed to anyone else

[@byronmitchell22]

"See you guys on the flippity flip" - Michael Scott

[@joshuanattinger9694]

Perfect. From the start I was wondering about the twist. It's the vibration that undulates everywhere. Nothing is still or perfect. Thanks dude!

[@keiyakins]

Going way way deep into seemingly trivial topics is no joke one of my favorite genres of KZbin video. This is amazing.

[@ksharky888]

what a nightmare for the sound guy

[@shri__can]

Why?

[@seftimmermans5031]

@@shri__can There is no sound in slow-mo

[@Swagmittens]

whaaat?

[@Swagmittens]

@@seftimmermans5031 oooh wow

[@Totto87]

Slomo guys also pointed it out. I was actually surprised by the fact for some reason. They do a very good at fixing the sounds to the point as it sounds naturally slowed down as part of the entire filming sequense which had me fooled until it was explained.

[@techuila]

Wow. This is my new favorite video especially that ending!

[@JayDGaming]

I love your older videos! I hope you see this but i think that all your videos are just a simple yet deep way to learn amazing things. Thank you Destin.

[@logshred9168]

I absolutely love your channel, thank you so much for everything you do.

[@samfutch8994]

"A cow is a sphere in a vacuum". I like that

[@etooamill9528]

lets then approximate pi to 3 to help the multiplication

[@MisterPaulch]

Destin be honest: How many attempts did it take to nail the the half court shot?

[@singhaladitya]

SmarterEveryDay what's that ?

[@kellyhofer]

seems like a hackey type of link

[@NightBriinger]

Click on his channel. It's a fake. don't go to the link it's probably a scam or something

[@singhaladitya]

Kelly Hofer you're right. I got really confused. Why do people do that? :/

[@singhaladitya]

NightBringer yeah 🤕

[@ancientswordrage]

This is by far one of my favourite vids of yours

[@Phildo386]

That yellow domino that stays standing is an absolute unit.

[@Thesignalpath]

Beautiful and relevant discussion at the end. Thank you!

[@WillArtie]

Hey TSP! Love your channel too!

[@Thesignalpath]

Andre Gulbis Thank you. It would be amazing to do a video with Smarter Everyday one day. :)

[@DonRideauxCrenshaw]

I rarely comment on KZbin videos but this is just too good to go unremarked. Thank you for both the content and the context. My take away from this -- make sure you've extracted ALL the signal before declaring the messy stuff just noise.

[@antopolskiy]

that's a really good point. also -- sometimes you can understand the reason for the noise, and it can be illuminating

[@chaoaretasty]

Not quite, there's two things at play here. On one level the difference between a first and a second approximation. At both levels you can extract useful information but without throwing away the second approximation noise you can't see the minor speed difference from the moving average. On another is context. Yes there's peaks that look like a pattern but without the context of the slow motion itself the runs aren't long enough to say that those peaks are genuinely a pattern rather than just noise. With the slow motion as well you can see the twists and align it with the peaks as Destin did and have a physical basis for the pattern.

[@pjm329]

I've been watching and enjoying your videos for a while now. This was the one that made me subscribe.

[@TheSandyNub47]

Hi, this was amazing especially the twist! I’m a certification specialist and I also love Laminar flow. Thank you!

[@MC_Grenada]

This video was really entertaining to watch and learn about how such minor imperfections in a system can cause such big variations in results

[@keronplug14]

MC Grenada butterfly effect?

[@TylerOstergaard]

1:54 this moment demands a like and subscribe to this video

[@TylerOstergaard]

kelan andersson nice on the report looks like they got it. It did look way scetchy

[@MrBeanbones]

No no... 10:33 THIS moment deserves a like for the entire video.

[@reesemartens759]

Hey Dustin, I know this may be super late, but when I saw the footage of the hardwood dominoes, I saw the intermediate axis theorem at work. I might be crazy though.

[@jgreenesq]

Great lesson, Destin! I love your theme here.

[@dj_laundry_list]

Why not use a telephoto lens? 1) You can make small angle approximations as needed (sin θ ≈ θ ) 2) There is less rectilinear distortion 3) You have enough space 4) Today's high res cameras capture enough spatial resolution 5) you can light the dominoes like a christmas tree to use a fast shutter speed

[@derradfahrer5029]

In addition I think a top view angle to see the vertical rotation better would also be very interesting.

[@dj_laundry_list]

Agreed, cyclist

[@BenjaminLovelady]

I would have expected slipping would be faster, because the moment of inertia is lower. But I guess more energy is directed forward when it doesn't slip... Heavier dominoes would have a higher moment but also more stored energy, so I don't know what would win. Might be fun using dominoes with different mass distributions, i.e. light dominos with high moment (weight on ends) and heavy dominoes with low moment (weight in middle). Interesting how it seemed to reach a terminal velocity.

[@RaydarCreative]

I just wish I had a sliver of the fascination and knowledge for everything like Dustin has. Love the videos man!

[@MerchantMonk]

Man... you really touch my very spirit sometimes. Your passion just eminates from you. I would love to hear you preach the word!

[@erickuhn1042]

Nice work on the statics!! It's cool to see what I learn in engineering school being used by one of my favorite youtubers.

[@CompilerHack]

Felt really sad for the Domino at 11:08

[@timobachmann5934]

The Compiler it had one job

[@newbtopolis2124]

Nuuuuuuuuuu! ;(

[@mattalbin8164]

Am I the only one who gets butterflies in my stomach from the simple perfection of SmarterEveryDay’s videos?? I love it how he states simple facts of physics and how they make total sense every single time

[@gwbuilder5779]

Hey Destin. I just watched this domino/physics video. I am a practical application engineer/carpenter/mechanic/designer/teacher/musician. As I watched your observations my thoughts wandered back to when I was a child in the 60s. Space and physics have always amazed me. Here are a couple of considerations. 1. Gravity 2. Earth's rotation 3. Gyroscopic reverberation 4. Concusive reaction 5. Rebound 6. Sonic frequency Ok, so there are more than a couple. Ha ha ha... A part of the baseline to consider must be dominoes of different materials to observe the variables in reactions. For example: You used clear acrylic dominoes. What about the standard ebony (black wooden) type or dense white plastic, marble, aluminum, stainless steel, and so many others that dominoes have been made of. My observations caused me to think about so many of the variables and even counter-variables such as momentum responding to the impact which in turn reacts to the vibrations caused by the impact becoming a completely different and opposing force causing the tiles to walk backwards while still falling forward. The noise on hardwood clearly allows far more reactions to be seen as compared to the felt which as you said muted and provided traction, but in turn provided a different set of reations. I realize that there millions of tangents presented here; however, my first thought was frequency. As in vibrational reaction and responses. Starting with the initial contact each successive contact is altered by every physics law applied all at once and varied by each individual response and following reaction. The acrylic material is a highly melodic type of material in other words, it conducts high moving frequencies and sound vibrations. Think of dropping an 8 foot long 2x4 on a concrete floor. The board will hit the floor, bounce, make a sound, and all the while it will be vibrating at differing frequencies throughout it's length from end to end. The length and width will obviously influence all of those responses and reactions accordingly, along with density and weight. Of course this is just one set of variables. Other variables like reflex, rebound, sound waves, and so on.... Hopefully you and your physics enthusiasts can see the amazing possibilities presented here.

[@danielcookman3971]

Yo Destin, Physicist here! This video was awesome, but I've got one question to ask: have you got any error bars? A standard rule of experimental physics is that data are useless without knowledge of their uncertainty. In particular, the v-t graph that 3Blue1Brown had seemed like addition of error bars would help the analysis. Without them, it's impossible to tell whether your conclusion that one goes faster is truly valid, or if you can't reject the null hypothesis.

[@EisenFeuer]

You want the data for yourself?

[@danielcookman3971]

Eisen Feuer You know, that would be kinda cool! Part of me is tempted to do the error analysis myself when I have some spare time.

[@frognik79]

Why? There's no peer review or need to replicate.

[@erlandodk]

+frognik79 Because error bars are an important part of doing science.

[@frognik79]

You missed the whole point of this video. Where's the error bars for a cow in a sphere in a vacuum?

[@tHaH4x0r]

I think it is a mistake to look at this data in a time domain. Why not take a fourier transform of the data, that would certainly confirm or deny to show the frequency of the 'twist-slam' phenomena you mention. Just random distributed 'white' noise has a noise spectral density that is constant, so if there is a cycle it will show up as a peak in your frequency spectrum.

[@christophernelson9891]

tHaH4x0r I think I know what that means basically, so yeah Destin, do this!

[@jean-lucfacade6219]

tHaH4x0r yeah destin, do this.

[@NotCrossEyed]

Alternatively, a time series analysis would reveal things like how the fall time of the current domino effects (predicts) the fall of successive dominos. The twist phenomenon might manifest as "seasonality" which indicates there is a cyclic trend. There are lots of cool ways of mining this data.

[@jean-lucfacade6219]

NotCrossEyed yeah destin. Not everything is rockets.

[@23chaos23]

Also notice the Euler's function? that twist, tap, tap tap push is reminiscent of Euler"s disc

[@captchagod64]

this is unironically one of the best SED videos

[@francesco8083]

Grande! I Watch you from italy and this channel has just become my favorite one

[@danieldelaney3793]

PSA-There is a fake Smarter Every Day Channel in this comment section. Please be very cautious of any links he sends.

[@Brian-bd1gc]

*Fake Account Replies**

[@Matthew_6.33]

I knew, this bot will develop some intelligence some day!!! So scary!!

[@lolibear]

tru

[@ApocTheLegend]

are you sure the twisting wasnt from an imperfect system of hitting the first domino with your ruler or finger?

[@chilliewillie75]

I think this is the best video you have done!

[@MrHamsto24]

"Twist and Slam" sounds like a good name for a Beatles punk cover band. Seriously, your videos have reignited my love of learning at 29 years old. Thank you Destin.

[@Riddla26]

I AM 5 MINUTES IN AND IF THE TWIST AT THE END IS THAT THEY TWIST AS THEY FALL I WILL BE VERY UPSET! EDIT: Dammit Destin.

[@multi_misa72]

:)

[@smartereveryday]

It wasn't Holmes. It's that basic research is important.

[@matthewkrueger1718]

Could you use a graphed audio recording to see exactly when a domino hits the next one rather than having to follow the chain with a camera or is the speed of sound to low to get an accurate result?

[@Tomyb15]

Matthew Krueger my thoughts exactly, though he wouldn't have noticed the twisting that way.

[@wobblysauce]

That is another basic test, more information is good, but knowing what to do with it is at a later date. Que,. ISP and other people recording everything.

[@giovane_Diaz]

I wonder how if the sound signal of the dominoes is loud enough to make trough the sound of the camera rig to a basic mic or if it will ask for a more sensitive model, like a shotgun mic. It will help a lot with the frame trace since you can sync the mic with the camera using a sharp sound on the start. Trying to make a clear sound/vid shot will get more sensitive but may payback well

[@neutronstar6739]

Well there is no sound in slo mo cameras, this is all just added effects.

[@orbik_fin]

Not a bad idea but it would be really hard to extract useful information out of it, because: 1) The dominoes make more than 2 hard collisions each and the one you're most interested in isn't necessarily the loudest one. 2) Tracking the toppling with a highly directional mic is even more challenging than with a camera. If the mic isn't very directional, you'd get extra noise from the previous dominoes still tumbling down. 3) If tracking isn't perfect you get a measurable amount of doppler shift, possibly distorting the result. 4) You'd probably want to do this in a minimally reverberant room - not cheap if you also need ample space to move around. Also, the high speed camera already records video at effectively audio rates.

[@elwcareer]

Bro! Subscribed just because of the twist ending. Awesome!!

[@xraider64]

Great video! loved the experiment and message at the end.

[@Razer-pm9zp]

You missed us on KZbin for the data blast. I guess I'll just have to follow you on another platform as well to help out in the future! :D

[@kautzer]

The sound of the falling dominos is amazing! Here is what I noticed while watching slow-mo videos: Small objects seem to behave exactly like large ones, but way faster. Or the other way around: If you slow down fast movements of small obects, the behavior shows the exact same over all appearance of large objects. (E.g: the small and therefore light dominos sound an fall like big, heavy stones, when shown in slow-motion) Is this phenomenon adaptable to every (macrophysical) occurence?

[@kamilmikolajczyk6776]

Kautzer actually I think the sounds here are faked. Some time ago, Destin credited a person responsible for sound editing because it's so cool and realistic, not real though

[@Inritus618]

Yeah, I'm pretty sure you're right. As far as I'm aware, the Phantom slow-motion cameras don't record audio at all, so unless audio was taken from another camera and slowed down (which I don't think is the case given the pitch of the sounds in the video), they were faked. Very well, I might add!

[@part-timepartytime9621]

Almost every single slo-mo video you've seen has had faked audio. These companies are making slo-mo cameras, not microphones.

[@trulyUnAssuming]

The issue is: you record an audio strip with an audio wave. Now you want to play that slower. But if you use the same audio waves and play them slower, that means that you reduced the frequency of the sound. Which means everything sounds lower. That is why if you play a youtube video faster now it would correct for that such that the voices don't suddenly sound different. So is the higher or the lower sound the correct sound?

[@ItsJustGilly]

I partially agree with you, the objects seem to act wxactly the same, but just faster. When slowed down they look just like how big objects would react. The sounds in nearly every slow-mo video are fake though, they're made by sound effect guys

[@mrlucasftw42]

The audio on that is really cool - the gym echo and everything

[@OndrejFicek]

One of the bestests of the best episodes of SmarterEveryDay

[@beauthaven6280]

This is very fascinating

[@laureen69]

That's the best motivation that i've heard... lol thank you

[@getgudmedia7934]

Now that I know sound is added post-pro, mad props for getting all those domino hits in time. Even has the double-hits since the dominoes hit one edge then pivot to hit the opposite with each fall.

[@ulianotech]

@12:31 i am so glad someone feels this way because i was taught to question everything. i always try and learn something new everyday hence watching your videos all the time. but i dont like when i ask a question that sounds silly, so i can understand something, and somebody gets mad. so glad your not that guy destin!

[@BrianDaleNeeley]

I have never heard the term "basic research" before. This is a really interesting concept.

[@bubblebaath7840]

I never realised pizza was so complicated

[@salussolutions5977]

Your videos are inspirational and absolutely amazing. Please don't ever stop - Johannesburg, SA.

[@miketracy5603]

I love your analogy..... Brilliant!!!

[@davegmorgangmail]

That was your best outro ever (I'm the one who asks stupid questions at work).

[@mangokraken]

*_I think a lot of times we forget or overlook how complex the universe we live in really is._*

[@snootdingo9365]

Yes! And when we try to observe and dissect the inner workings of the world or universe, everything changes

[@fpscanada3862]

Hey, ive watched your videos for years, never subscibed, dont think i will. But just want to say thank you for actually making videos that teach me something almost everytime i watch one.

[@randoprior4130]

I would recommend subscribing then! There is no real reason not to unless you find you aren't enjoying the content. It is worth it even if you don't religiously watch every video. But that way it won't be a year later that you find a video since you get to see uploads and choose what to watch. Just my two cents! I never used to subscribe to anyone. Now, if you get my attention I'll subscribe until I decide I don't like the content or the personality.

[@HelloKittyFanMan.]

I like the colors you used! Happy Christmas!

[@josephjackson1956]

Can I like this video over and over again? Sooo many wonderful things about science and knowledge about simple scientific methods that, when put together, help create complex solutions built from simple solutions. This video is AWESOME!!!!!!! :D

[@CJWarlock]

@2:32 I can very easily imagine a young viewer going like "Mom, I wanna be a contraption fabricator!" XD The job's name sounds awesome, so many R's! ;D

[@gamerkeks7997]

You are downright amazing. You and all the people you work with.

[@chrisnewman7863]

Dominoes - The start of the sequence was not flush to begin with hence it will rotate the affect through causing the result we witnessed. The foundation medium played a large impact on the way the dominoes fell. I REALLY like this channel, and I am now subscribed. Thank you for the content, you rock!

[@neumoniad]

Please be real. How many shots did that backwards half-court shot take?

[@smartereveryday]

Around 10ish

[@cassolmedia]

I love this video so much!

[@ashwith]

You have mind control powers! I actually turned to the screen when you said "look me in the eyes"

[@robhoward7041]

Destin, I've got to say that your work is very inspiring. "Crowd Science". Your own SETI following doing crowd sourced analysis of data. Your videos are fantastic tools for my kiddos (8,10,12 yeas old) as an ice breaker into STEM. Well done sir. Thank you.

[@thedrinksustainability1477]

Dustin I love your videos, i have subscribed already. But you are a goofy guy. (I say that with love) i love your personaiity and enthusiasm for science. Keep it up! Have a good one