This Square Can Roll Like a Ball

In this video I show you some interestingly weird shapes that seem like they shouldn't roll, but somehow they do. I talk about this science and physics of rolling and what causes something to roll vs slide. I talk about slip vs non-slip conditions of rolling.
Where to buy: You can search "Flipo Flip" on Google to purchase this. There are some on Ebay, Alibaba and Amazon and a company on Kickstarter is selling them as well!
Get Your Experiment Box Here: theactionlab.com/
Checkout my experiment book: amzn.to/2Wf07x1
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*Any experiment you try is at YOUR OWN RISK. The Action Lab assumes no responsibility for any injury if you attempt anything you see in this video or on The Action Lab channel.

[@TheActionLab]

A lot of people are asking where to by them. You can search "Flipo Flip" on Google and there are some cheap ones on Ebay, AliExpress, Alibaba and a company on Kickstarter is selling them as well! Have fun flipping!

[@kokinikiju]

yes !

[@lukmly013]

AliExpress has more complicated name for it: Flipo Flip Desk Toy Rotating Pocket Toy Fidget Kinetic Spinner Birthday Xmas Gift Children Adult Stress Relief Toys Dropship

[@michaelprimes2039]

Got mine from flipoflip.shop I think that’s the main site

[@paxhumana2015]

@The Action Lab, are the realms of gravitational pull, magnets, electromagnetism, and friction all related?

[@willisbestname1203]

I would have liked this, but it had 69 likes... sorry man, can't mess that up.

[@TheSecondVersion]

3:31 - Bowling lanes are *oiled* most of the way leading up to the pins, but the last few meters at the end *aren't.* Skilled bowlers impart a spin on the ball so that it slides relatively straight down the lane, but then *changes direction* due to friction when it reaches the non-oiled portion just before the pins.

[@vixterrawks4171]

He’s obviously not a bowler (Lebowski)

[@Grasfh]

@@vixterrawks4171 foot was over the line

[@FlyingBanana78]

@@Grasfh I am the walrus

[@virtualexplorer278]

@Noob Destroyer no he is a noob destroyed by you

[@FlyingBanana78]

@Noob Destroyer I am the walrus. Coo coo ca choo

[@greminboye]

Square: rolls Circle: hey that’s my job

[@tahahusain7328]

Yeah

[@ldrago2019]

,😂

[@DevPatel-tk5ny]

Let me correct you *Sphere "Am I a joke to you?"😂

[@greminboye]

Dev Patel wooosh

[@XariksBeatbox]

Oh.... that’s.. clever.

[@sohopedeco]

Squares be like: "They see me rolling, they hating."

[@santtusammakko4254]

xdd

[@Alikaykillerfour4]

Cringe overload

[@valorantclutch729]

Is this some kind of brawl stars reference.

[@TheLeftyGamer0]

Spd gaming yes but no

[@Alikaykillerfour4]

Spd gaming maybe you’re just playing way too much brawl stars to be able to differentiate between basically any other references, and a supercell game.

[@mistersaur]

Don't worry, this bug will be fixed in next Universe Timeline patch.

[@AshanSanjula]

😁

[@sujataavulapati7414]

I am a in a game ur all in a game to hehe

[@vod7280]

Yea but the devs are like valve and havent updated in a while

[@unnecessarilyepic1107]

@@vod7280 I hear that the new update will have something to do with the current pandemic event, something about that human nerf we've been waiting for.

[@SnakePartyPL]

@Unnecessarily Epic i got leaked information that this nerf will be not being able to be outside without mask for longer and there will be limited time for being outside

[@sam_lvlcnrn1492]

Circle: I can roll Square: I'm about to end this man's whole career

[@DrYesorno]

*Sphere

[@shrekvin3457]

Dr. Yesorno circle can roll too...

[@_Cfocus]

@@shrekvin3457 circle is 2D its only in the drawing we don't have 2D objects.

[@shrekvin3457]

@@_Cfocus well, if you cut the paper into a circular shape, it can still roll lol

[@rewrittenbytes1616]

CowGoesMoo that would be a cylinder, not a circle

[@micix5580]

1970: "We will have flying cars and AI robots doing our jobs" 2020: R O L L I N G S Q U A R E

[@giovannac.1531]

😂😂😂😂😂😂

[@xplosive3]

😂😂🤣😂😂🤣😂😂😂🤣😂🤣😂😂🤣🤣🤣🤣😂😂😅🤣😅🤣😂🤣😂🤣😂😂😂😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣🤣😅🤣😅🤣😅🤣😅😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣🤣😅🤣😅😅🤣😅🤣😅🤣😅🤣😅🤣🤣😅😅😅😅😂🤣🤣🤣🤣🤣🤣🤣🤣😅🤣🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅😅🤣😅🤣😅😅🤣😅🤣😂😂🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅😅🤣😅🤣😅🤣😅🤣😂🤣🤣🤣😅🤣😅😅😅🤣😅🤣😅🤣😅🤣😅🤣🤣😅🤣😅🤣😅😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅😅🤣😅🤣😅🤣😅🤣😅🤣😅😅🤣😅🤣😅🤣🤣😅🤣😅😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅😅🤣😅🤣🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅🤣😅😅🤣 not funny

[@brodyenli]

S Q A R E

[@Ho3n3r]

That's sqary.

[@yingxiawei821]

*square

[@azhakabad4229]

Imagine How cars will look like after upgrading with this wheels.

[@ajithsb1853]

Also the driving experience will be awesome 😜

[@keiji1531]

Someone did that anyway...

[@Gabriel-se6tj]

I don't think it will be good for someone's stomach like you are jumping every second at a speed so fast that you will become a shaking machine

[@ajithsb1853]

@@Gabriel-se6tj I just said the same thing sarcastically in my comments on the top.

[@herohuntergarou69]

Mr indian hacker has already done that check it

[@ldrago2019]

2020: Squares can roll!! 2021: Any shape can roll!!

[@tahahusain7328]

I Think That It's True

[@unthinkable9096]

😂😂

[@AnandKumar-ym9yw]

2022 we are rolling 😁😁

[@anarcocapitalista3700]

Go to see sphericon, it's similar to this.

[@codyamerman146]

Imagine if houses rolled

[@planktonfun1]

The guy who invented square wheels: "Well, well, well.. who's crazy now?!"

[@Kittsuera]

only issue is we have the square wheels attached at he wrong point. the need to be [] not [__]

[@oni8337]

suspension would be a whole nother problem

[@w1nt494]

"We'll have flying cars in the future" 2020: Walking shapes

[@guilherme6818]

First thing that I thought when i read the title: "If it rolls like a sphere then it's not a square" lol

[@kalpanapatel2387]

It is cup of tea for someone preparing for JEE advanced 😂

[@siddhantkhanna3763]

Isne toh pure rolling samjaya hai,😂😂😂😂

[@evasanth1896]

😂😂😂

[@bugs9284]

Thanks for the tea chap

[@potatotomato2564]

Clearing it is the task... you may prepare for ages though

[@sandipanshekhar7146]

Its a moment of inertia question

[@robertweekes5783]

You describe physics so well! Making it easy to understand. Keep up the good work 👍🏼

[@aneeshlol2015]

1:38 “it rolls down the ramp and starts rolling “

[@jamalsdurag599]

You missed the cut

[@halicusnguyen8864]

mom: we have spheres at home spheres at home:

[@georgebarbos6969]

Circle : wait you can roll? Square : Always has been!

[@g_ato1978]

"You can" "Always has" Dude.

[@georgebarbos6969]

@@g_ato1978 what

[@g_ato1978]

@@georgebarbos6969 I don't think "Always has been" is the right response to "Wait you can roll"

[@georgebarbos6969]

@@g_ato1978 ik, but it's messing up the meme

[@shwetachillal3780]

Such videos are enough us enjoy therotical things we read, in a practical way.

[@stevenguevara3252]

dude i love your channel so much, so glad I subscribed!

[@arianaviaolk8799]

square: rolls ball: am i a joke to you?

[@SolidMilk69]

The 3 knowledgeable quotes: “It rolls down the ramp and starts rolling” “People die if they are killed” “No matter the mission, you’ll die if you die”

[@ramanujan5624]

You are my inspiration to become an engineer! Thanks man

[@tahahusain7328]

Yep, He Is A Very Good Explainer On How Things Work!!

[@harshil6043]

Typical jee aspirant

[@sarthakjain1824]

@@harshil6043 😆😆

[@user-en5vj6vr2u]

Rebellio619 lmao

[@unthinkable9096]

Ma'am or sir

[@akashsunil7464]

I loved this video helps us to recover from all misconceptions people have about rotational motion

[@businessguide6219]

Reliable and humurous, the kind of resource I'm looking for!

[@ren6140]

Me to my friend: Just roll with it My friend:

[@Miyano_Shiho4869]

Me when I'm supposed to be studying for my exam : interesting

[@syper4202]

Love your videos man so informative and interesting 😮

[@blackbear92201]

Great video - thanks for posting!

[@EthanAllred1]

Sweet vid man. *Put those wheels on a toy car!*

[@charlies8538]

you can’t. there’s no center to put an axle

[@filgas0892]

Charle S I think there is in the side

[@charlies8538]

pippo & co no, the center of it would move up and down constantly so the one way you can make it as a wheel is if you make some sort of axle that can also move up and down, which is super inefficient and complicated, and the reason circles are used for wheels is because there is a center that stays in a consistent y axis so you just need to have a bearing attached for it to be able to rotate. So no, there is no viable way to make them wheelse efficiently since there is no solid center.

[@EthanAllred1]

I know it would be inefficient. But interesting to see.

[@eertikrux666]

If it’s a real car, it will be a total nightmare to ride!

[@nandakumarmunaganti2644]

It took me 2-3 revisions to understand "Why the ball rolls"... Anyways the video is just awesome...

[@tahahusain7328]

I Also Need That Shapes!! Very Good Video. Very Good Explanation

[@ankitnautiyal2568]

Nice Rotational Mechanics class. Cheers👍

[@shreyakakkar403]

Woah! This is so interesting!

[@miruxa.]

Square : I can rolling! Everyone : how? My dumb brain : why rick is still rolling?

[@LeprechaunJackson]

Why doesn’t your comment have more likes?

[@wiknzs]

i can rolling

[@merrsheepmsp1094]

Do you ever see a meme thats just makes you sigh because it's so dumb

[@king-qk4oz]

@@merrsheepmsp1094 No. This meme is brilliant

[@mrkitty777]

Tries Rick rolling once, it's fun. 😸

[@phonkystuff6269]

my man explaining gravity right here

[@akagrawal51]

U get so interesting topic that i have never even herd before and so i get more topic to flex on my friends

[@triffid0hunter]

I'm a little disappointed that you didn't go into how the friction at the leading corner controls rolling vs sliding - a non-round object must raise its centre of mass to roll, and the friction at the leading corner must be high enough to /lift/ it out of a sliding configuration for it to roll. Furthermore, flat objects don't preserve energy when rolling because a flat face meeting the flat surface imparts little to no torque (since kinetic energy vector intersects the center of mass), whereas a curved surface does impart torque which converts the linear kinetic energy into angular momentum. Your profiled squares roll because their profile is designed to provide a smooth conversion between linear kinetic momentum and angular momentum, whereas an object with flat faces will lose much of its momentum to sound and other losses with little ability to retain any of it.

[@d1rty_band1t49]

This is too big brain for me so like. Calm down you intellectual boio

[@mynamevirtual6389]

Well said, it was a nice channel but now looks really boring and without sense

[@soybins6902]

Someone is speaking the language of a gods

[@alstonmiller212]

NERD!!! Noice

[@jessepatnaude5397]

Where did you purchase these?

[@elliotb8782]

*a m a z o n* i think

[@xXDEFIENCE2066Xx]

Lol If there is one thing, I love about this channel. it's how he explains everything. lol I litterally just saw an ad on these things. And after a youtube search. Action lab, has a video on it. lol

[@thomashughes4859]

1:40 - 1:47 - that red point on the ball traces the cycloid, my favourite shape of all time! Long live isochronism! 2:21 - 2: 35 - you will see bowling balls on oily lanes skid till they dig and curve in for a strike! (3:25 - Nice!) Great vid, Professor!!!

[@abdulfatahsanni439]

I just bought it at flipoflip.shop. Thanks Man

[@Bullyrok]

I came to the comments for the link lol, thanks

[@abdulshaban4618]

Damn bro. I spent the last 45 minutes trying to find a place to buy thanks a lot

[@abdulfatahsanni439]

Abdul Shaban 😂😂sorry man

[@michaelprimes2039]

Thanks

[@averageanon5504]

Reminds me of those magnetic clatter toy. Also I need that for the pure joy.

[@dat1pengu1n]

@Sanjay sridhar lmao it does rhyme, toy - joy

[@XariksBeatbox]

Finally, I’ve found some use for the physics I’ve learnt

[@devendravyas7986]

I want to see some old style practical u used to do with equipments

[@SaifHack]

Does anybody remember the mokuru the little fidget stick it also rolls like that

[@pushkargarg5558]

How did you hurt yourself while sleeping Well Thats hard to explain I rolled off my bed

[@bernardocarneiro2110]

Thats pretty interesting, and i think you could as well have a similar video explaining why a sphere, in some cases, rotates having a space variatiob of pi*r instead of 2*pi*r

[@dymytryruban4324]

I would also like to point out that in vertical rolling squares, vector (from center mass) of gravitational force easily goes outside the base thereby contributing to fall. I mean that if an object is on flat surface, it has foundation which is in contact with this surface. If we draw a vector that, when extended, goes outside of this foundation, then the object is unstable. When rolling square is horizontal, it still has some rotational kinetic energy (mass-moment of inertia*angular velocity squared/2) allows it to overcome the gravity that tends to stabilize it.

[@davr9724]

"It doesn't look like these should be rolling" ? It looks like it was specifically designed to roll

[@pufferfish2163]

wait till this dude finds out about spheres the mans gonna lose his mind

[@cheatsheet3325]

Takes me back to when I used to roll squares with the boys.

[@jameshuckabee7677]

No matter the topic, you never disappoint on delivering quality, informative content. Thank you sir.

[@dionyzbaan7588]

Me: can i see the coments? KZbin:nope

[@user-js4sv7ku3p]

what?

[@Souvik_Dutta]

@@user-js4sv7ku3p Its an upgraded version of commenting "First"

[@user-js4sv7ku3p]

@@Souvik_Dutta ohh i see, thx

[@imdickbutt]

*W-What about a triangle?!*

[@renzezekieldivida3014]

When you show your mom a square that rolls and turns it into a lecture

[@modestogeek7238]

Very cool! Your videos are great!

[@aadityachaturvedi3937]

Square and Hexagon(together): we can rollll too! Circle: Mai kya karun phir..job chod dun!

[@tahahusain7328]

Nice Joke. Are You An Indian??

[@aadityachaturvedi3937]

@@tahahusain7328bilkul bro

[@tahahusain7328]

@@aadityachaturvedi3937 I Am Also Indian

[@aadityachaturvedi3937]

Nice!😊

[@aadityachaturvedi3937]

@@tahahusain7328 do u watch his videos regularly

[@PremKhunt]

Square: rolls Circle: Am i JoKe tO yoU

[@rafidyasar9225]

He is the most nicest science guy on internet

[@salcontrino]

The music while it was rolling was on point 👌

[@saranshvottery6507]

Me: Opens KZbin. KZbin: Wanna see a square rolling? Me:why not

[@StarWarsTherapy]

He said “roll a square” hehe 🌿🚬☺️

[@alecstrassburg4765]

For whatever reason KZbin stopped showing me Action Lab videos for a year or so until now and I totally forgot about it

[@TheActionLab]

thanks for coming back!

[@burntcookie2542]

This is gonna end up on everyone's recommendations now

[@RavinderSingh-tn7zi]

Hello everyone *This is Your Daily Dose Of Internet*

[@KodiboiOfTheCentury81]

Fact: every comment right now didn't watch the full video

[@tahahusain7328]

We can say that it's an awesome video by just seeing this for 1 minute

[@KodiboiOfTheCentury81]

@@tahahusain7328 yes

[@xchara6996]

I finished the vid just to comment this 💀

[@SiliconeButts]

The music in your video is really nice, is that youtube music or did you get it from somewhere or someone?

[@hoptanglishalive4156]

You've cornered my inertia.

[@hi-ey3hy]

dang

[@trol_mans69]

wat

[@KodiboiOfTheCentury81]

Is your brain destroyed? Yeah, same

[@trol_mans69]

@@KodiboiOfTheCentury81 mhm

[@Grubbet]

I keep seeing ads for this online. I was hoping to see a video of someone covering this.

[@tomonkysinatree]

The frictional force during rolling is also going to be proportional to the weight of the object. Think having them being made of aluminum/metal helps with the friction over a similarly smooth surface plastic and hollow item

[@ekiin8]

balls and squares where paid actors XD

[@xpndblhero5170]

4:20 - I don't think that's how a Lego would be able to roll, I see it as the rotational speed overcomes the gravity so the sides don't touch the surface but the corners do so it rolls smoother than usual.... You can see that whenever it doesn't bounce up after a few rotations then picks up speed.

[@DIYTAYSEERworld]

Explaining on a BAKING TRAY was awesome... LOVE the way you explain.. Hat's off to you.. Keep making amazing vedios for as.. Thank you

[@imagesbyraphael]

Here's something that hasn't been covered extensively on KZbin which would be right up your alley: Optical bonding / optical contact. There are clips online but you would have a lot more fun with the phenomenon and explain it a lot better than what existing videos would.

[@blueclragon]

2021: rolling square 2029: *R O L L I N G T R I A N G L E*

[@K9River]

Cube: I can roll! Ball: That's cute.

[@ElSanto0044]

Thanks, now I know how to roll my squares!

[@K4SHXF]

Square After Rolling:I just wanna Rolly Rolly Rolly.....

[@nathanagcaoili7250]

Everybody gangsta until the gamecube intro becomes real

[@travp959]

great channel, nice shirt. keep up the great work

[@EXPLORADVEN]

I have to watch this with sound... Very interesting and basic physics. 👍👍👍👌👌👌😀😀😃

[@RandomYT05_01]

Wow, he reinvented the wheel.

[@bradleyfitzik3603]

If the square is flat it's much harder to roll. Those special rolling ones aren't flat. They have extended middles making them roll

[@HarlanHarvey76]

Hey - should explain why the spinning ball reverses rotation when dropped straight down???

[@Ar.Raghav]

I interpret it in a different perception. The centre of gravity of that object keeps changing and so that point is pulled to the ground and thus it rolls. So those squares had a little bump on their centre, which made the shift of centre of gravity when pushed. So it keeps changing the centre of gravity for each rotation.

[@rosefindleyson]

I like this KZbin channel because it is very educational

[@adityakumar9562]

rolls down the ramp and starts rolling

[@genrevnarvaez1376]

Someone just asked me what is that when I'm tired Me: it's just a ball in disguise

[@tampazeke4587]

It must be amazing to be able to study and full understand these things without it making your head hurt!

[@flebedebeb4739]

PLEASE link to where you purchased these! I need one of these in my life.

[@DynamicEllie]

Also waiting for link

[@samdayton37]

Saaaaame Edit:found link in another comment: flipoflip.shop/

[@onechannoplaybokusueve5985]

Please consider to add where you obtained the background music , and it's name . It's useful for projects explanation

[@Orelaf84]

That’s so fun! It would be fun if I could make one for myself.

[@MichaelBattaglia]

The action lab is on a roll!

[@dedgr0undhog392]

This is so easy to understand, it’s using centrifugal force to move around, the shape of the surface let’s it allow it to roll

[@jeffo9396]

Centrifugal force isn't the reason these objects roll. It has to do with angular velocity and friction.

[@TheHappyKamper]

I like how you just slip a whole maths class in this video.

[@dorkultra]

I bought this at 2am one night after seeing on instagram, it took a month to arrive from china. i rolled it about 20 times and it's sat in a drawer since then.

[@stevedoolan1540]

That sound of it rolling slowed down at 0:39 is giving me goosebumps

[@thickmomson]

Everybody gangsta till a sqare starts rolling