Dominoes - HARDCORE Mode - Smarter Every Day 182

  • Published: 11 December 2017
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    Slow Motion Sound, Ambiance and musicy things by: Gordon McGladdery did the outro music the video.

    Dominoes Provided by:


    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:

    Rotational Inertia of falling dominoes can be calculated with this.

    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.

    I'd like the thank everyone who follows me and especially those who helped process the data (names at bottom)

    @smartereveryday on Twitter

    I'm "ilikerockets" on Snapchat.
    Snap Code:

    Smarter Every Day on Facebook

    Smarter Every Day on Patreon

    @smartereveryday On Instagram

    Smarter Every Day SubReddit

    THANK YOU to the following folks who helped process the data names below!
    (See the data here:

    GH, Blitz, Kelly F., Ruvi L, Kelly F., Andrés L., Andrés Lit., Austin , Kelly F., Ely, Blitz, Blitz, Nathan Graves,

    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,

    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,

    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,

    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

    Taxikab96, Wilda666, MrThursty, Christopher Britten, Kyle Pham, rafasc, HooliganTim, Grant Peter, nickleplated, Kyle Pham, Tommy Smith, Tommy Smith, Chris Allen, Georges Jaar,

    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.

    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.

    Warm Regards,


  • Science and Technology Science and Technology

Comments • 3 751

  • 3Blue1Brown
    3Blue1Brown  2 years back

    What a surprisingly fascinating topic!

    • Phil Chia
      Phil Chia  2 months back

      Is there a "terminal velocity" for falling dominos?

    • yolars69
      yolars69  4 months back

      I wonder if the air between the dominoes has an effect. I you did this in a vacuum would it have the same results?

    • Explore NC
      Explore NC  4 months back

      For an infant i suppose it is surprising and fascinating.

    • Kevin Knox
      Kevin Knox  5 months back

      Love your work, Grant!

  • TLW6767
    TLW6767  10 hours back

    I was just watching the in depth set up domino video you have on your other channel. When you asked Lillie if they've ever tried Arial footage. I was wondering if you could test if a drone can create enough downward air movement to knock over or effect the dominos once they're all set up. You'd have to use Steve's swagar stick to set up mass amounts of dominos, which I think is your style. Wouldn't it be so worth it if the drone didn't effect it. You could get amazing footage next time.

    • boper
      boper  2 days back

      Why not use a domino rally set?

      • Jin Shikami
        Jin Shikami  4 days back

        Need a circuit solution? Why not use this Spot: androidcircuitsolver/app.html

        • Carlo Bertoia
          Carlo Bertoia  1 weeks back

          I hope you paid your sound designer extra for this one!

          • Unknown_Darknass
            Unknown_Darknass  1 weeks back

            How many stairs are there?

            • Thắng Thế
              Thắng Thế  1 weeks back

              i need slow motion when she changing pant...

              • theysrone
                theysrone  2 weeks back

                Definitely looks like an LDS church

                • Josh Thompson
                  Josh Thompson  2 weeks back

                  Whew!! Getting emotional over here. I’m not crying, you’re crying. You goin for an academy award or something?!

                  • 梅嶺七萬便當軍魂

                    3:05 心有戚戚焉
                    跟寫論文的時候一樣R 我完全看出來他很悲傷 XDDDDD

                    • Matthieu Simard
                      Matthieu Simard  3 weeks back

                      10:45 He's f*'n badass! He's like that dude in super-mario, that rectangle monolith with an angry face that falls down as soon as you come closer. "Moving ahead! Get off!!"!

                      • Min Eung Kim
                        Min Eung Kim  3 weeks back

                        This video was sponsored by.


                        • Jiří Bém
                          Jiří Bém  3 weeks back

                          love the explanation of why you have did this :] 11:14 - 12:54

                          • Bobby Doyle
                            Bobby Doyle  4 weeks back

                            I know that gymnasium!

                            • McInTEC
                              McInTEC  4 weeks back

                              Would the earth spinning have anything to do with the twists?

                              • ---ElectroMan---
                                ---ElectroMan---  4 weeks back

                                But couldn't a heavier material reduce the 'twisting' effect? What I assume are acrylic dominoes, if you were to change them to (hypothetically) lead domino's or another material that doesn't flex easily, the twisting effect would be negated would it not?

                                • BleedingRaindrops
                                  BleedingRaindrops  4 weeks back

                                  "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.

                                  • 101 Percent Kyle
                                    101 Percent Kyle  4 weeks back

                                    How old is uh- Hayden? Asking for a friend

                                  • Aditya Mishra
                                    Aditya Mishra  1 months back

                                    Destin's wife- What's hardcore mode?
                                    Destin- Oh, you'll see

                                    • Jared Bergsma.
                                      Jared Bergsma.  1 months back

                                      would you not be able to used a telephoto / super-telephoto lens and record from a distance? the further away you are the less perspective distortion there would be.

                                      • Kerbaman
                                        Kerbaman  1 months back

                                        0:10 I don't just watch animals squirting things.....

                                        • Mark Bisson
                                          Mark Bisson  1 months back

                                          Now add some variable, like cats. 😸

                                          • Mohit Singh
                                            Mohit Singh  1 months back

                                            Wait does the smoothness of the surface, and the way the initial impact of the ruler impact the way the dominoes rotate and hit each other?

                                            • Arbaaz Jamadar
                                              Arbaaz Jamadar  1 months back

                                              Best episode ever

                                              • Bryson Williams
                                                Bryson Williams  1 months back

                                                Wow, I didn't know how things that seem to be simple can end up so complicated.

                                                • tankerboysabot
                                                  tankerboysabot  1 months back

                                                  I suppose there was no way to do this with a curved mirror? I am only asking after a few minutes in the video.

                                                  • Carlo Sabbatani
                                                    Carlo Sabbatani  1 months back

                                                    ins't the initial force applied to the domino matters?

                                                    • Lotsagrapes
                                                      Lotsagrapes  1 months back

                                                      haha I hear 3 blue 1 brown as I afk again

                                                      • #PossiblyRandom Gaming
                                                        #PossiblyRandom Gaming  1 months back

                                                        He started the video at exactly 4 o’clock

                                                        • Argonpath Art
                                                          Argonpath Art  2 months back

                                                          You should try the whole thing over again in the future with a domino laying template rack to level out the human random spacing variation.

                                                          • Jakub
                                                            Jakub  2 months back

                                                            I really enjoy living in the XXI century

                                                            • Dave-TBR
                                                              Dave-TBR  2 months back

                                                              Oddly satisfying ASMR video 1 by SmarterEveryDay

                                                              • David Park
                                                                David Park  2 months back

                                                                I’m craving jolly ranchers and jello

                                                                • GBRL
                                                                  GBRL  2 months back

                                                                  This is interesting, I would advise though if you want to retry it, to do a mecanical pusher so that the starting velocity and point of intersection matches each time. I'm guessing that the speeds do differ because of the force put up by your cousin. Humans can't control their accuracy and force that much. That's why the rotation in the dominoes and might want to think about the small imperfections in the dominoes too. So the data might be obsolete in your study. /justmytwocents ^_^

                                                                  • CJWarlock
                                                                    CJWarlock  2 months back

                                                                    The end scene rules. :)

                                                                    • CJWarlock
                                                                      CJWarlock  2 months back

                                                                      I've heard 23andme's results are too veg and inconclusive to risk your DNA sample privacy. Plus they add by default a ">1% African" to every result (possibly because of PC reasons). Use it once and you'd have to be ready for the future AI to revoke your biometrics-dependent public transportation access rights if your China-like social-credit drops because of your private opinions. ;)

                                                                      I know a sponsor is a sponsor, I just didn't like to be silent about it... ;)

                                                                      • CJWarlock
                                                                        CJWarlock  2 months back

                                                                        @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

                                                                        • Charles Mbuvi
                                                                          Charles Mbuvi  2 months back

                                                                          Hello @smarteveryday, i watched this video am still amazed by it. To start the domino effect, instead of pushing the first domino, try using a pendulum ball to initialize the fall. And use the same height to drop the ball... Just my 2 cents
                                                                          Good stuff keep it up up.

                                                                          • Nover 05
                                                                            Nover 05  2 months back

                                                                            OK STOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP, I've made it 12 secs in, but let me get this straight. I come here to see videos that expand my mind, in what ever capacity that may be. Math (I really hate), science, laminar flow, even dominoes or whatever this video is going to be about. This turned out to be one of my favorite videos.

                                                                            • FatiTank Drawings
                                                                              FatiTank Drawings  2 months back

                                                                              The sound was made good too!)

                                                                              • Ace Johnson
                                                                                Ace Johnson  2 months back

                                                                                The power of enertia actually moves in a corkscrew. If you look at a the graph and a corkscrew at a side view , in 2D it looks like a wave. Think of how the momentum would travel at an over head/ 3rd person view above the dominos

                                                                                • Ace Johnson
                                                                                  Ace Johnson  2 months back

                                                                                  If you hit the domino on the left side ever so slightly more, a clockwise rotation would start first and visa versa

                                                                              • Mateusz Czerniawski
                                                                                Mateusz Czerniawski  2 months back

                                                                                This is awesome! I give you my subcriptiona and my like!

                                                                                • Randall Thomas
                                                                                  Randall Thomas  2 months back

                                                                                  There is a dissertation hiding in here somewhere.

                                                                                  • Mike Machnicki
                                                                                    Mike Machnicki  2 months back

                                                                                    Just discovered this interesting video. Maybe I'm being naive but wouldn't it be easier to time the difference between the first domino hitting and the last domino then average the speed of the cascade. You could also make a stepper motor cart to do the filming run by an Arduino

                                                                                    • Rudra
                                                                                      Rudra  2 months back

                                                                                      who has got so much courage to dislike videos like these.....fear god people,cuz he likes sciece too

                                                                                      • littlefave
                                                                                        littlefave  2 months back

                                                                                        I'm a Civil Engineer who is completely fascinated by things other people think sound boring! Thank you for feeding that side of me lol!

                                                                                        • PRAKHAR GUPTA
                                                                                          PRAKHAR GUPTA  2 months back

                                                                                          Wouldn't it before great if it is shot from above?

                                                                                          • ActionJackGaming
                                                                                            ActionJackGaming  2 months back

                                                                                            Did we ever discover if dominoes fall at different rates depending on their colour?