Testing If You Can Blow Your Own Sail

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[@MarkRober]

You now know 7 amazing new things and that’s cooler than magic! Get the CrunchLabs Build Box with two FREE boxes here- crunchlabs.com/teaser

[@ThreeSheep69]

Estoy triste porque hoy es mi cumpleanos y no tuve ningun suscriptor.

[@RandomFacts_s]

I like this

[@QUAKATAKA]

E

[@Blazer69420]

Yooo

[@devyiron874]

nice

[@YouTube]

seated for science class

[@thedeathmatchrun2366]

I'm gonna copy your homework in science class

[@anikor7860]

Actual youtube watches mark rober on KZbin isnt that crazy

[@irobot67]

Where are the custom 20 million play buttons?

[@I_eat_toes789]

Nice

[@EzyPup]

14 likes

[@niicount]

As someone graduated in physics, I have never seen such a clear explanation of what the coriolis effect actually is. Amazing.

[@ch22770]

dayum

[@stare4539]

lol

[@HRR402VR]

Fact:air is a gas is not a fluid

[@montano0222]

Somewhat sadly, I feel that he should’ve credited Destin and Derrick since he explained it exactly as they did

[@Qlapze]

@@HRR402VR physics major here, you are mistaking fluid for liquid. A fluid is just a substance that can freely move from force (in the case of air, turbulence or wind).

[@richiemouritsen8026]

what the heck was jimmy doing there 🤣that was so random: "lemme guess, crunch labs" 🤣bro just spawned in

[@city-ships]

Your explanation of Coriolis effect is really clear. I cannot explain like you even I am a physicist. Thank you.

[@mikiqex]

That backpack reminded me, if you walk with your drink, the equal frequency of your steps is building up waves in the mug, so ultimately you spill it. I do my "silly walk" with unevenly distributed steps and it truly helps make my way without spillage. With that walk I basically create waves that go against the waves I already created in the mug, mimicking how active noise cancelling works in ANC headphones.

[@rambot670]

thanks for the tip!

[@RampageG4mer]

You should apply to the Ministry of Silly Walks

[@Realboofpackog]

Deja vu intensifies

[@eitantal726]

I heard that if you grab the mug from the top, it won't slosh as much

[@ubentobox]

I know of the walk you speak of and have had to use it in certain circumstances, but I've had more luck trying to act like a gimble and it's more satisfying when you don't spill XD.

[@andrepereira3338]

Regarding the backpack: when you study vibrations in engineering, you learn that there's a specific frequency in which you can vibrate a spring-mass system where it will not transfer that movement to the mass. That's why there's a "sweet spot", and all the people in the commercials were running with that sweet spot frequency, where the backpack barely moved even while they were running (i.e. the movement of the person was barely transfered to the backpack). This depends on the spring constant of the springs used, and on the mass of the system (the backpack and whatever's inside it). So if Mark were to put more weight in the backpack, he'd have to find a different running frequency in order to get the same effect. Thanks for sharing all these cool experiments and knowledge with us, Mark! You're awesome!

[@marzipancutter8144]

Now I'm wondering if it was possible to adjust the stiffness of the spring on the fly. It might be completely impossible to do this to a degree where it can be controlled electronically in real time, but it's a fun thought to imagine the backpack changing its spring constant to stay in the sweet spot for any given mass and walking speed.

[@jarsky]

@@marzipancutter8144 You could probably leverage automotive engineering concepts for this rather than electronically. If you look at suspension, there are progressive springs which as the spring compresses changes the resonant frequency. You can also get dual rate springs, where you have a main spring of one size/rate, and another spring of another below it on the same strut. That would be ideal for riding on the main spring and retaining resonance over the flat, and the shorter stiffer spring for taking the big dips, and again should stop it from falling into another phase frequency. But of course you would still have the issue of the frequency being dependant on the weight of the pack.

[@aaronkoning7255]

I imagine this is exactly how birds can run with their head completely stationary. Their neck muscles are like a spring, and their head is actually bouncing up and down perfectly in sync with their legs.

[@KarmaCadet]

yeah my high school teacher managed to explain resonance pretty well so this made sense too :)

[@Lovely_Tea_drink]

Lovely reply

[@G_Bl4ze]

Bro Mark Rober is the GOAT of science because of how simple he makes science so that everyone can understand. Thank you Mark Rober!

[@915CLOS915]

Love the way you explain everything in Layman's Terms. Thank you for sharing all this content with all of us!!!!!!!!!!!!

[@KalijahAnderson]

"Does it work when I pour the water?" LMAO. That guy's reaction was priceless and translated perfectly into 'Ah, crap, you noticed what I was doing.'

[@matthewroy7718]

I went there with my kids and it looked legit. Thanks Mark for showing the real science.

[@seanbrockest3888]

0:48 "Not just what, but why" is the mantra of every good educator! Thank You Mark!

[@-GoGoPlayerars]

❤

[@liliowen2132]

Unfortunately I don't understand the rope thing as I have dyscalculia. I can do basic maths but even then I struggle with 7 times tables and above (10 and 11 is easy though). I can't do algebra nor trigonometry. Physics is also an issue due to that, biology is the best. In very simple terms, how does the rope thing work?

[@seanbrockest3888]

​@@liliowen2132by rope thing, I assume you mean number five, the belt around the Earth. That's actually simple math, the problem is that we imagine it takes a lot more length to do a thing that actually requires very little. You can simulate this for yourself, take a length of rope or string, hold it against a wall with both thumbs. Take a look at how very little you need to move your thumbs towards each other to make a significant bend in the rope.

[@TheBigLou13]

"because I'm the teacher and I said so", as (unfortunately) many teachers would say.

[@danielhanawalt4998]

Nicely explained and demonstrated. Answered some questions I've had. Never felt it an absolute necessity to know the answers to, but interesting to know.

[@Mr.Rendier]

Your amazing, sience is mostly hard to explain but you make it look easy. Well that is a BIG talent. Respect

If only school were as entertaining as Mark's videos...

[@Henyahyah]

Oh no it’s X they’re everywhere

[@Landybryce]

OOGA booga

[@Wenas2005]

@@Landybryce berbagiwenas @rekaputri

[@Wenas2005]

@@Henyahyah baru kenal wenas @rekaputri

[@Landybryce]

@@Wenas2005 yes

[@OfentseMwaseFilms]

1st time learning the difference between a Cyclone and a Hurricane. I thought one is air, the other is water based.

[@ZER0--]

I thought it was called a typhoon.

[@Masontheimbecile]

me aswell.

[@RyanIsHoping]

You're thinking of tornadoes and hurricanes. Cyclones and hurricanes are both water based, tornadoes not. I had the same confusion for a moment!

[@briebel2684]

Hurricanes and typhoons are both tropical cyclones. The only difference is which side of the international date line the storm was named.

[@bigquazz3955]

@@ELPATO136 And hopefully it stays that way for another few birthdays until you grow up and away from begging.

[@oluwasegunsalako5034]

Wow, I learned a lot in 17mins. This is the kind of recommendation I'd love to see

[@anesennaidoo5279]

Thank you Mark Rober - I always learn so much from your channel

[@PolyCodeOfficial]

After a busy, busy week of school, a Mark Rober video is just the thing I need

[@Dynamicdrifting]

@@LRmssK4 get a life

[@LukeSalazar-sh2mp]

smae

[@PassionFruit69420_]

Underrated comment

[@samkavanagh9165]

I make better content

[@Xander_X]

Couldn't agree more

[@user-wp8rn3qg5f]

Mark would be a great science teacher really enthusiastic and explains things great

[@ThisGuyDannyyy]

He is basically Sid the Science Kid in real life

[@universaltoons]

*Mark Rober inspires me... My parents said if I get 25k foIIowers, they'd buy me a professionaI camera for recording... literally begging you guys...* ❤️🍓

[@LeahBreHappy]

@@universaltoonsstop begging and it will come

[@ThreeSheep69]

Estoy triste porque hoy es mi cumpleanos y no tuve ningun suscriptor.

[@RobC1999]

Yes, but he reaches more people this way.

[@MarkHawkinsFlute]

Best explanation of the Coriolis effect I've ever seen. Well done!!!!

[@EraX52]

Mark makes science much more interesting and something that catches your attention. I also love that mark puts PVZ music with this, so relaxing and makes it much funner to learn.

[@tbluge]

Mark is such a treasure for humanity. Imagine how many kids are getting interested in science because of this gem of a human. What a role model!

[@ItachiUchiha1611]

cant agree more , im 28 and he gets me interested in science XD

[@knowledgeispower817]

Or adults

[@_moritzperez_]

Only that is speaking so fast that it gives you anxiety in this video 😅

[@cochanharbison8747]

He’s like a new Vsauce

[@TTVWarps]

im 16 and this just helps me with science

[@Mift_13]

What's more exciting is when people explain science in a practical way without causing headaches, greetings from Indonesia ❤

[@michaelsambhi4331]

Have you ever wondered what it would be like if you had autism?...

[@Mift_13]

@@michaelsambhi4331 I don't know and don't let it happen

[@MrGamelover23]

​@@michaelsambhi4331what a random question. It's not great.

[@CaffeineCaffeine]

@@michaelsambhi4331 I don't have to. It's not fun.

[@jonp3890]

Hello, Indonesia. Still beautiful? Still diverse?

[@jumblyman]

brilliant explanations as always

[@AgricultureTechUS]

Fascinating! I could watch those machines all day.

[@josephovervliet3291]

The Sheer disappointment in his looks after saying "As we all know the earth is... A sphere ಠ_ಠ" Too hilarious. I appreciate your videos Mark

[@danti2563]

Flat earthers: And I took that personally

[@chaks2432]

@@danti2563 I don't understand why he'd say that. As a former NASA engineer he should obviously know the Earth is shaped like a doughnut

[@user-zl1vf4me1p]

@@chaks2432 You misspelled "Cube" pal.

[@bananapeel908]

@@user-zl1vf4me1p i think you meant "Triangle"

[@d3w1h7]

@@bananapeel908velociraptor*

[@Yenzi769]

Mark's videos always make me feel smarter after watching them.

[@ThisGuyDannyyy]

First

[@ThisGuyDannyyy]

This video will be 1 on Trending

[@user-ws8jj6fg9r]

Did you buy subscribers?

[@bexiexz]

no same

[@user-rs8ex9wh7o]

Youre talking to a literal robot ​@@bexiexz

[@Fun_facts-js5xs]

Love this video, thanks for teaching all this stuff ❤

[@soundhealingbygene]

How did I not see this 3 weeks ago. KZbin needs more of this content I hope you can keep on creating awesome videos like this one and so many others that I have thoroughly enjoyed watching as an adult well most of them

[@MangoVid]

When I watch Mark's video, I discover more about science.!!. Love your videos, Mark!!

[@ThreeSheep69]

Estoy triste porque hoy es mi cumpleanos y no tuve ningun suscriptor..

[@Platypus_Warrior]

But the earth is flat, I saw it !

[@joelch20071]

@@ThreeSheep69 porque me voy a suscribir si no tienes contenido

[@Platypus_Warrior]

@@ThreeSheep69entonces talvez compleanos solo son algo comercial. Lo que passa cuando tu madre ace parear con un multiplo de 365 dias? Nadie. Cresce

[@horizionactual]

No . Just no.

[@vincetanner4153]

Thanks for coming by In-N-Out , I was the gentleman that took a picture with you and your family... I was calling out the numbers😁

[@swabla240]

@@envycollar sowwy :3

[@Vid_Master]

​@@swabla240No he shook his hand!!!! it was cool

[@mitchtalmadge]

@@swabla240 Why would you make such a pessimistic comment? I've heard Mark loves his fans.

[@swabla240]

@@mitchtalmadge ye but im probs his favorite fan anyway!!

[@lihdegu8294]

@@swabla240lol you’re a troll

[@robledoux6998]

Fantastic and very well thought out video. Keep up the great work...

[@L4ND.SH4RK]

Thanks, Mark! Wonderful video, as always!!

[@Mqrq_69]

This guy made me understand the coriolis effect in a minute rather than 2 whole months of my aviation degree

[@fredrikstadguttatyvesekste773]

Came here too comment that😂

[@randykeith1203]

I've heard of the Coriolis effect before but never understood what it was suppose to mean

[@rbesfe]

You must have really awful professors then, or maybe you need to re-evaluate your choice of degree

[@beta1451]

@@rbesfe well an aviation professor vs a literal ex nasa scientist, who do you think the better teacher will be the guy who teaches about planes and aviation or the guy that literally helped with parts to spacecraft

[@tappajaav]

@@randykeith1203 Coriolis effect generally refers to how Earth's axial rotation affects various phenomenas around us

[@tutoring1013]

Thank you for helping to curb ignorance around the globe one experiment at a time!

[@dbnpoldermans4120]

Somebody is going to fall in a ravine with that backpack I think more engineering is needed with that backpack. I have several great ideas

[@ZuhalDucem]

I've seen videos of the sink demo and have always wondered why over such a short distance we'd see such a dramatic result. I'm glad to see some evidence backing up my intuition. Thanks Mark! obviously *AWMKToken* is in a great spot

[@shadowlaw333]

Could you imagine how disorienting that would be to walk across the equator

[@Tiger10002]

Estoy triste porgue hoy es mi cumlpeanos y no tuve ningun Suscriptor.

[@ryzendc]

@@Tiger10002 que bueno

[@AgEcon-World]

😂😂😂 me too

[@Non_Consistent_Potato]

AWMKToken is a bad idea though

[@thebobloblawshow8832]

Mark single handedly has educated more kids in America in the last year than the entire American educational system combined. 👍👍

[@user-so2ic2ne5f]

He taught me more

[@JebbyVR]

Nah the whole world

[@vgf_cracked7260]

This just doesnt make sense

[@user-mj3iu9nt7e]

日本にも技術届いてます😊

[@jhonperloureal923]

Of course this is what happens when you put most of your time into watching yt videos, rather than focusing on your study.

[@alfonzo9289]

I have wanted one of those hoverglide backpacks since they were first put on their funding site. Im sooo pumped you did this!

[@joeclark7888]

Thanks for a cheerfully entertaining video with many interesting lessons! 🌞

[@masic.]

2:48 that was so funny because I actually got a tour of my brother on the capital and he knew about this and I was able to hear him clearly when he was whispering. It was pretty cool!

[@653-gm2yf]

hello I am a second year middle school student in Korea and a student who participates in the sunpla hanging exercise. Mark ROBER Thank you for always uploading interesting science videos and providing a wealth of knowledge. Always upload interesting videos and work hard.

[@MoltenNinja-mo4br]

Hi Korean dude

[@aceplaysgamesnetwork9566]

I swear if schools took this approach to teaching people would probably be a lot smarter. Excellent job of keeping my attention.

[@prabhakarrao4922]

Excellent Video. Really like the content & your presentation style. Thanks

[@MLeoM]

I learned so many new things just by watching this KZbin video. That hasn't happened in a long while.

[@que5646]

didn't you go to school? everything he tells, schoolchildren in my country study in the first 5 grades of education (they learn this before the age of 12)

[@badouplus1304]

@@que5646 Yeah, sure, I am pretty sure people in your country (like everyone else in the world) would still be tricked by some phenomena mentioned in the video, especially the balloon in the car or the rope around the earth because people do not spend enough time to really think about it. Sometimes, the answer is counter-intuitive and people generally go with their intuitions, even when it is wrong. Anyway, there was no need to be obnoxious but hey, maybe you learned to be like that before the age of 12.

[@MLeoM]

@@que5646 Wish our education system was this interesting, nothing in our curriculum was remotely like this. Some of it like the balloon, I guessed corrected what would happen, but nope our education system is terrible.

[@tappajaav]

@@que5646 That's great for you! Too bad not everyone in the world is given equal starting points in education. I'm also curious how much of that information you think you can recall, say, 20 years down the road?

[@cefcephatus]

I love how the bigger your lab gets, the simpler phenomenon you make in the show. And that's the beauty of getting big. You can make things that's already simple even simpler, which is harder than simplifying complicated stuffs.

[@user-wk9ve7ly3c]

Yes, you can use a large fan to push a sail boat. I tried it and it works. !

[@andyowen1025]

This generations' Bill Nye, Mr. Wizard, etc. Excellent science class today, Mr. Rober! (Keep it up! I think I love your content even more than my kids' do (and they LOVE it)).

[@scottrichter1858]

Came here for one clip, stayed for the whole video.

[@LR13Red503]

Same here

[@ShaharAmin]

It’s like mark knows how to grab audience ha

[@m4teo852]

Came for Mark Rober... Wait

[@user-gu3cv8xx9v]

Realllll

[@anton2563]

Same

[@ChichotKruka]

As a Mechanical engineer my self your videos are bringing joy to my heart and soul. Keep it up buddy! Love your squirrel park.

[@user-xb1oi5ig7g]

Господин инженер-механик... А что вы думаете насчёт проблемы паруса и вентилятора? Поплывет лодка? Я просто юрист, но мы, юристы, дотошные и доскональные.

[@stevvilla6072]

Gracias por visitarnos saludos desde Ecuador. Thank you for visiting us, greetings from Ecuador

[@asfandyarfarooqi7924]

You explain it brilliantly. So much that I sometimes doubt that you are American 😅. Kudos

[@michaelelder3945]

Loved the video. The physics stuff was cool, but what I really enjoyed was your enthusiasm. Love the energy.

[@sighmon5640]

7:20 only, if you change the shape of the sail a little bit, it suddenly does work. because then it funnels all that air backwards around the fan.

[@splsgh]

target thrust reverse?

[@chaoswraith]

Still better pointing it backwards since you'll inevitably lose some energy to friction as it redirects 180

[@stefan514]

​@@chaoswraiththat's not the point. It's not about whether it's better or not, it's about if it works at all and this was misrepresented in the example with the umbrella. This would totally work even without and electric skateboard if you do it correctly

[@EliasKaydanius]

@@stefan514 i feel like the testing should have been focused on whether the "thrust reverser" in the form of the umbrella would actually be enough to overcome the friction to actually get the whole thing to move.

[@Tyrian3k]

Well, yes, just like a simple U-shaped pipe would make it work.

[@aidandiaz1451]

I felt like I was watching a Bill Nye video in science class! You explain science in a very entertaining way and I love it!

[@hockeyhands5604]

Mark, for the sail and the fan, what if you put the fan blowing from the side and the sail in a beam reach, then adding a counterweight on the other side? This way, the air molecules bouncing at an angle off the fan would push the boat forward and the counterweight keeps the boat balanced.

[@DVnc_]

8:17 Mark trying so hard not to blush😂

[@TheDevilThatSmiles]

Lol

[@agneseozolina1380]

Im 13(14 this year) and never been interested in physics, but a few years ago when i found Mark's yt channel i remember when he was making the squirrel series and now my dream job is to be an engineer! Im bummed that i cant get hi monthly kits, bc i live in a small country called Latvia, which is completely on the other side of the world, so shipping would cost a lot. i just think that Mark is an amazing human being and his videos are one of the few actually useful and educating videos on youtube! 4 years ago i didn't know anything about physics, but now my main monthly event that i can't wait for is watching mark's new video!

[@conorgalvin4289]

I found another science based channel as well! It's called kursgesagt.

[@blurry2246]

noob

[@ashlyn_1424]

That is so cool! You will be a great engineer some day!

[@agneseozolina1380]

okay, im gonna go cry to sleep now and tell my mommy abt you😢@@blurry2246

[@TheVilivan]

Nice! Keep learning, stay curious and resilient!

[@javimelecio]

that much extra rope is absolutely WILD Great video Mark!

[@BetoChavez509]

Wish the world could have more teachers like you

[@4RILDIGITAL]

Impressive dedication and thoroughness with which the myths were debunked. Learning was made even more interesting by not just revealing the answers, but demonstrating how they were acquired.

[@ThreeSheep69]

Estoy triste porque hoy es mi cumpleanos y no tuve ningun. Suscriptor.

[@Dwoplet]

Dont Like This

[@yeetdabeans3883]

what is this chatgpt comment

[@Tiger10002]

Estoy triste porgue hoy es mi cumlpeanos y no tuve ningun Suscriptor

[@georgehill3087]

But he got blowing your own sail part wrong. Blowing your own sail does work, just not efficient. We have reverse thrusters on planes that use that principal. It's not like pulling yourself up by pulling on your hair. The energy is contained within the system. Blowing your own sail has energy escaping the system, just that most are going sideways with a little going backwards, hence the inefficiency.

[@LukeTube007]

I love this guy. Mark Rober gives us so much fantastic energy from his presentations, yeah actually gets me Jazzed like a little kid! You earned a dedicated viewer Mark!!!

[@gosteipostei9960]

Caraaaa, o truque do balde no final do vídeo foi sensacional! 👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻🤣😂😂 Tenho 48 anos, e há uns 30 anos uma rede de TV 📺 aqui no Brasil mandou até repórter para mostrar isso, na programação deles de domingo, cara, fiquei admirado com a reportagem na época, e hoje depois de 30 anos só fiquei sabendo da verdade através do seu veículo!👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻🤣🤣🤣🤣🤣🤣

[@RihanBaig]

Best Video Ive seen this year!

[@NeseHasan]

I first the puzzler about increasing the radius of a circle by 1 foot years ago on an in-flight magazine. I spent time figuring it out and it has stuck with me ever since. Thanks for demonstrating it to my skeptical kids. how long is *AWMKToken* opened to us?

[@ragedragon1018]

pls explain....I'm trying to get this trend, last time I didn't know what people were saying was the 50,000 reasons of Verbalase...did Mark endorce AWMKToken or something@@crack2102

[@Tiger10002]

Estoy triste porgue hoy es mi cumlpeanos y no tuve ningun Suscriptor.

[@Non_Consistent_Potato]

Who are you asking that last question to?

[@randomsomeguy156]

Bot

[@-M05]

I got a brain tumor trying to read this

[@squidwardo7074]

Am I the only one who can't stand the speed and fast edits in this video (and your recent ones)? Much prefer the older style of editing

[@Irfan_1]

That's true. it's the new KZbin style popularised by Mr Beast

[@mediaaccount8390]

it feels like he's yelling at me the whole time (and it's not pleasant )

[@dingbaaat5569]

unfortunately thats how youtube works these days

[@H0LMES7777]

yes thats really true, it‘s the nwe style inspired by Mr, Beast

[@xCyOfficial]

Attention spans lessen and Stimulation increases 🫨

[@yamini100]

It's so interesting bro 😊 , esse bhut khuchh sikhane ko mila aur aapne us tourist attraction ka bhanda bhodha kr diya 😂😂, thanks brother

[@TheXYGhost]

That was the greatest introduction to many phenomena that physics have to offer in such a short time. The flat-earthers are going to have anxiety attacks and tantrums over this. This was a great video for kids and adults alike. Great video.

[@en5788]

This is the best video yet! Getting back to basics. Making science interesting again!

[@fireball9567]

Mark Rober is really just out here being the new Science Guy. Getting a whole bunch of people interested and passionate about science. What a legend.

[@sarzidev9487]

new??? mark rober has been here almost since the beginning of youtube

[@PeteVanFleet]

FYI - New "Science Guy" as in Bill Nuy, not new to the Internet@@sarzidev9487

[@gabrielperez1199]

​@sarzidev9487 Bill Nye the science guy is the science guy before KZbin even launched

[@dr.wheezy3787]

@@gabrielperez1199BILL NYE THE SCIENCE GUY! BIIIILLLLL NYYYYEEEEE THE SCIENCE GUYYY! BILL BILL BILL BILL BILL BILL, BILL NYE THE SCIENCE GUY! He will FOREVER be the ORIGINAL science guy! I don’t think I’ll ever forget that legendary theme song.

[@dr.wheezy3787]

Not to take away from how awesome and legendary Mark Rober is, he just wasn’t the first.

[@darralpphillips]

Love your videos, I am 53 and learning something I didn't know. Cheers From South Yunderup Western Australia 🇦🇺

[@MK8MasterJunjie]

Wassup fellow Aussie.

[@faraibernard6452]

reverse thrust in Jets uses the same principle as the umbrella . you may wan to look into that. the trick is to get the air to flow in the opposite direction and not flow sideways

[@masonhoughton7885]

Blowing your own sail, while wildly inefficient, does actually work with a traditional CURVED sail. The curve captures the air from the fan and redirects some of it backwards, which provides a small amount of net thrust in the opposite direction of the fan. Love the channel, but I would really appreciate Mark revisiting and clarifying this

[@erwtgfan3877]

He should have mentioned the reverse thrust on a jet engine

[@ATuinhek]

Yeah exactly, with thrust reversers being a nice example.

[@MrGamelover23]

He literally did it on a real boat with curved sails and nothing happened?

[@cuddlestsq2730]

@@MrGamelover23Might be because of the positioning of the fan and its size. The fan was much lower than the sail, so the air would be redirected more upward, and perhaps the since the fan was close in size to the sail the air flow from the fan would disrupt the redirected air from the sail.

[@jimmychin8313]

does that mean that the leafblower & umbrella might work without the motorised skateboard?@@cuddlestsq2730

[@u3pvip]

Wow. I actually watched the whole thing and I have really short attention span. Love how you explained things and demonstrated in a smaller scale/perspective.

[@SosaHITM]

The Mrbeast effect

[@download6108]

MANUAL DO MUNDO da gringa kkkk Otimo conteudo, dinamico e explicativo! Estranho como um canal gigantesco eu nunca tinha ouvido falar.. e do nada essa recomendação do youtube.

[@FlickSeven]

The way he said the earth is a sphere sounds like the most intentional thing ever lol

[@ErdemErgun-qy2od]

It is still fun to watch the video even if you know the stuff. Mark shows everything practically which is fun to watch bring the heat with *AWMKToken* we gonna have a huge year btw

[@Tiger10002]

Estoy triste porgue hoy es mi cumlpeanos y no tuve ningun Suscriptor.

[@Non_Consistent_Potato]

AWMKToken is actually terrible

[@randomsomeguy156]

Bot

[@zeynepkasapoglu1594]

selamunaleyküm

[@benderbendingrodriguez420]

BOT

[@rnqtn]

6:56 goes to show how showing props to demonstrate really show how something works. That was very well explained.

[@bendetta7319]

Men eres un capo, aprender contigo es más divertido que jugar juegos demuestras que no es imposible enseñar sin que todos se duerman, además que para mí una cosa muy importante al enseñar es el maestro y su actitud, ya que si es gritón y malumorado es difícil no contagiarse, pero si derrama alegría como tu haces en tus videos es imposible no contagiarse al menos un poco.

[@iaco7874]

Your vids are my fav keep it up mark

[@therelaxedguy542]

Thank you for coming to Ecuador! Wish I would’ve come across you and met you one of the days of your stay.

[@appefjant1961]

dude i love mark rober easily the best youtube chanel out there. Always new highly interresting theories, knowledge and experiments. Thank you!

[@Wenas2005]

Cinta kita hidup wenas @rekaputri

[@Ajreyes-nq1di]

thanks for using ecuador i’m ecuadorian and it makes me proud such a great person is visiting my country

[@rajeevranjan84787]

I learnt very much from this video Thank you

[@GokayAli]

Love how you did several things in one video just some more detail figured *AWMKToken* is worth to know now

[@NotAPolarBearXD]

bro is advertising a cryptocurrency how sad

[@Tiger10002]

Estoy triste porgue hoy es mi cumlpeanos y no tuve ningun Suscriptor.

[@user-mp9qf5zy3l]

@@Tiger10002 eso solo es su problemo yo creo

[@benderbendingrodriguez420]

BOT

[@noname-pu2jl]

The demonstrating practical experiences makes the video pure gold.❤

[@Wenas2005]

Indonesiaku wenas @rekaputri

[@showpavelraevsky4971]

🙂Я просто хочу получать удовольствие от жизни! Я не хочу хамить, скандалить и что-то кому-то доказывать, не хочу тратить время на общение с теми, кто мне неприятен, с людьми, которые меня не понимают, и пытаться достучаться до них. Не хочу пытаться вмещать свои мысли в чужую голову. Мне некогда! Я хочу жить своим настоящим. Я просто хочу ЖИТЬ! Радоваться каждому моменту, каждой улыбке прохожего, каждому дню, в независимости от того, солнечный он или дождливый. И очень не хочется разменивать эту потрясающую жизнь на пустоту, мелочи и бессмыслицу….

[@Wenas2005]

@@showpavelraevsky4971 Indonesiaku wenas @rekaputri

[@Matthiasas99]

You can explain everything better than any physics teacher

[@realryleu]

i noticed you didn't fasten the waist straps on the backpack. doing so moves the force that the backpack exerts on you from your shoulders to your hips, which means there's less _you_ that the force gets exerted on, which makes it more comfortable and easier on your back

[@TimeBucks]

This is the best video yet!

[@rezanurrahman3213]

first

[@liamsama13]

second

[@Seed]

Mark and MrBeast and Mark collab in the same day??

[@StoicMotiv833]

Yoo

[@ikeahedgehog]

Why did you put mark twice

[@nezlockyeet8672]

And Ryan Trahan.

[@MxneyRBLX]

and ryan trahan

[@user-yx5su6lf3v]

Hi

[@FloeAnimations]

Thanks for the science homework 👍

[@dexonquinonezc5707]

Thank you for visiting Ecuador Mark 👏

[@sstreakzzzz]

This is one of the coolest videos I’ve watched in a long time. Physics is just so cool

[@herbig3517]

RIP Globe _ 2015_ we have 200 Proof ON Every Platform!

[@FerroVisuals]

I watch you all the time... but this videos makes me appreciate how well you explain complicated subjects and make them easy to understand.

[@aeches]

ive been watching mark for years. today i got an announcement in schoology about how my marine scence professor met Mark Rober in the last few days and i'm insanely jealous.

[@Shad0wSeeker922]

every time you post it makes my day

[@kjohnson8174]

Wish I had you as a science teacher 50 years ago. I might have actually been interested and learned something. Glad I can learn it now listening to you.

[@mrosskne]

Your teachers were fine, you just didn't care about school.

[@Woad25]

@@mrosskne So you don't think that teaching is very much a part of a performance art as well? Well, looks like we found the crappy teacher in the comments section.

[@kjohnson8174]

@@mrosskne I guess you went to school with me and you know all about me so you are able to say that with surety. I'll take part of the blame but I was just trying to say that Mark made this very interesting.

[@CosmicAggressor]

This is a really fun way of explaining things at a very basic level. Although with the fan and sail thing I would actually expect the boat to go forwards very very inefficiently due to the reaction of the wind artificial wind leaving the sail.

[@TurboSpeedWiFi]

It will absolutely work. The sail is a giant thrust reverser.

[@Murks33]

Yeah sure, but like he said, you might as well just turn the fan the other way for the same, if not better, result.

[@Shortchenel889]

This is what will happen, for example, when you are at school, you never miss class, you will learn Indonesian, mathematics and other things

[@ProfessorLyle]

So glad you exist, Mark.