The Bizarre Behavior of Rotating Bodies, Explained

  • Am Vor 9 Monate

    VeritasiumVeritasium

    Dauer: 14:48

    Spinning objects have strange instabilities known as The Dzhanibekov Effect or Tennis Racket Theorem - this video offers an intuitive explanation.
    Part of this video was sponsored by LastPass, click here to find out more: ve42.co/LP
    References:
    Prof. Terry Tao's Math Overflow Explanation: ve42.co/Tao
    The Twisting Tennis Racket
    Ashbaugh, M.S., Chicone, C.C. & Cushman, R.H. J Dyn Diff Equat (1991) 3: 67. doi.org/10.1007/BF01049489
    Janibekov’s effect and the laws of mechanics
    Petrov, A.G. & Volodin, S.E. Dokl. Phys. (2013) 58: 349. doi.org/10.1134/S1028335813080041
    Tumbling Asteroids
    Prave et al. doi.org/10.1016/j.icarus.2004.07.021
    The Exact Computation of the Free Rigid Body Motion and Its Use in Splitting Methods
    SIAM J. Sci. Comput., 30(4), 2084-2112
    E. Celledoni, F. Fassò, N. Säfström, and A. Zanna
    doi.org/10.1137/070704393
    Animations by Iván Tello and Isaac Frame
    Special thanks to people who discussed this video with me:
    Astronaut Don Pettit
    Henry Reich of MinutePhysics
    Grant Sanderson of 3blue1brown
    Vert Dider (Russian DE-film channel)
    Below is a further discussion by Henry Reich that I think helps summarize why axes 1 and 3 are generally stable while axis 2 is not:
    In general, you might imagine that because the object can rotate in a bunch of different directions, the components of energy and momentum could be free to change while keeping the total momentum constant.
    However, in the case of axis 1, the kinetic energy is the highest possible for a given angular momentum, and in the case of axis 3, the kinetic energy is the lowest possible for a given angular momentum (which can be easily shown from conservation of energy and momentum equations, and is also fairly intuitive from the fact that kinetic energy is proportional to velocity squared, while momentum is proportional to velocity - so in the case of axis 1, the smaller masses will have to be spinning faster for a given momentum, and will thus have more energy, and vice versa for axis 3 where all the masses are spinning: the energy will be lowest). In fact, this is a strict inequality - if the energy is highest possible, there are no other possible combinations of momenta other than L2=L3=0, and vice versa for if the energy is the lowest possible.
    Because of this, in the case of axis 1 the energy is so high that there simply aren't any other possible combinations of angular momentum components L1, L2 and L3 - the object would have to lose energy in order to spin differently. And in the case of axis 3, the energy is so low that there likewise is no way for the object to be rotating other than purely around axis 3 - it would have to gain energy. However, there's no such constraint for axis 2, since the energy is somewhere in between the min and max possible. This, together with the centrifugal effects, means that the components of momentum DO change.

jdub isbest
jdub isbest

Now the real experiment for the earth flipping, would be to have a heavy mass like a ball bearing spinning inside of another oblate spherical body.. Even though you seemed to answer it...

Vor 6 Stunden
Ryan Taylor
Ryan Taylor

Well Played Sir.... Match and Set!

Vor 9 Stunden
Mike C
Mike C

Could this be because of precession, which makes me wonder is the same thing would happen if it were a perfect sphere.

Vor 15 Stunden
Superabbas Almani
Superabbas Almani

Es ist schön, die Hartnäckigkeiten eurer suchenden Seelen zu beobachten hahahah ! Aber, es geschah im All und keine-r von UNS Allen kann es voll nachziehen, was diese Drehungen verursachte ? Die aerodynamischen Eigenschaften des Objekt während des Widerstand-Prozesses des inneren Luftes vom Raumkapsel ? Oder vielleicht die statischen unsichtbare Kräfte des metallenen Raumschiffes, das teilweise von elektromagnetischen Feldern beeinflusst worden sei ? Hahaha ! Trinkt noch een Bierchen .... hahahah dann geht es auch weiter ...im Leben ! Halleluja !

Vor 17 Stunden
Christopher Charette
Christopher Charette

Couldn’t the past 150 years of the extraction of oil from the earths crust cause a destabilization that might end up causing the earth to flip? Has anybody actually calculated how much volume all the extraction of all the worlds fossil fuels from the earths crust would actually add up to? For me that would be probably quite significant… Oh well I guess we’ll have to wait and see… And this is the type of thing that “big oil” already knows about and is actively suppressing.

Vor 17 Stunden
Mike C
Mike C

Doubtful. Since this only represent small fraction. Here is the Google reference. The total mass of both the extracted and reserves of oil and coal would thus represent about 355 trillion tons (or ~ 0.0000000058% of the Earth mass).

Vor 15 Stunden
jedi foghorn
jedi foghorn

Tv remotes work to. Noticed this when i was 12 (34 now) but never looked it up.

Vor 18 Stunden
K Anderssen
K Anderssen

Australia could be on top.

Vor 19 Stunden
K- M. Ehrenworth All Rights Reserved
K- M. Ehrenworth All Rights Reserved

Sigils hexagrams hexadecimal value XYZ axises it's cosmologee

Vor Tag
K- M. Ehrenworth All Rights Reserved
K- M. Ehrenworth All Rights Reserved

Ankh

Vor Tag
K- M. Ehrenworth All Rights Reserved
K- M. Ehrenworth All Rights Reserved

Hidden laws of Thermodynamics Airplanes planes powered by air compressor supercharger

Vor Tag
K- M. Ehrenworth All Rights Reserved
K- M. Ehrenworth All Rights Reserved

Atomic symbol🧲🛠️🖇️📐✂️🕒🕐🕐

Vor Tag
K- M. Ehrenworth All Rights Reserved
K- M. Ehrenworth All Rights Reserved

Scalar energy XYZ axis

Vor Tag
K- M. Ehrenworth All Rights Reserved
K- M. Ehrenworth All Rights Reserved

Marco Rodan vortex MATHMATICS monopole magnetizism in metalurgy camera obscura

Vor Tag
K- M. Ehrenworth All Rights Reserved
K- M. Ehrenworth All Rights Reserved

LAMINAR flow MATHMATICS

Vor Tag
pawan meshram
pawan meshram

I always wondered about this from my childhood. I was flipping my tv remote control in my hand and always my remote control will return in weird manner like this tennis racket. Try that... you will find this too...

Vor Tag
5Andysalive
5Andysalive

I discovered something. In the Apollo 11 movie from last year. There is a scene (on the way back, at begin and end of the little music part about 1h16 in) where you see a Cassette player rotate through the cabin. It does exactly this thing. Only nobody seeing this footage apparently thought about it. Or meybe NAsa also thought the world might end.

Vor Tag
J Helgeson
J Helgeson

I thought equinox was the word used for the equalizing the effect of the moons gravity and eliminates the rotational effect limiting it to summer and winter "pivot "and does mars have axis changes for the season's like this ?

Vor Tag
ray ham
ray ham

Youtube by the great Alphabet cannot even sort the comments by most likes! The list contains so many comments with no likes at all!

Vor Tag
ray ham
ray ham

There is no point to allowing comments when it requires an hour to trawl through to find an intelligent (life) one!

Vor Tag
Ace Mccloud
Ace Mccloud

Nothing like a lecture on inertia and mass while I drink my morning coffee

Vor 2 Tage
For Knowledge
For Knowledge

You can do it with a half comb

Vor 2 Tage
leopard tiger
leopard tiger

You are crystal clear brilliantly clear thank you physics is fascinating.

Vor 2 Tage
Gene Blodgett
Gene Blodgett

It still looks spooky!

Vor 2 Tage
Lam Par
Lam Par

The shape of the earth making Tennis Racket Theorem effect unlikely to happen in the future, unlike the bolt.

Vor 2 Tage
Ben Zuckier
Ben Zuckier

I hope my nuts don't rotate (Mayans, probably)

Vor 2 Tage
Michael Ganzer
Michael Ganzer

So all it takes are huge amounts of irregular weight shifts. Let's consider fast ice forming (Broken Gulf Stream) or fast ice melting (Antarctica). Theoretically this could destabilize the current axis and make our planet flip over to find a new axis to align with the new maximium moment of inertia. Would be interesting to see that as a simulation. :)

Vor 2 Tage
ريان
ريان

so that why they go to space ?

Vor 2 Tage
stulander
stulander

I'm so dumb.

Vor 2 Tage
Virun
Virun

13:58 But! At one point or many points during the Earths formative years, it DID flip, did it not?

Vor 2 Tage
Virun
Virun

And if so, someone or many someones could (if evil enough) cause an imbalance to the core of the planet sometime in the future causing the planets balance to go off...or we mine enough resources...

Vor 2 Tage
elnubnub
elnubnub

No prof. Tao??.... Call Bobby Lee science alert bip bip bip bip

Vor 3 Tage
Sam Rightin
Sam Rightin

So if the earth were FLAT it wouldn’t even work in space

Vor 3 Tage
Alex Marvin
Alex Marvin

I noticed the tennis racket thing playing with the remote control as a kid. I can flip a remote control in 4 directions and land it either in the same side I was holding with any amount of flips and an even amount of rotations, or land on the opposite side I was holding with any amount of flips and an odd amount of rotations when flipping the remote in the last direction, it actually takes practice because the flip is counter to how you release the remote/tennis racket... I dropped many remotes/tennis rackets I could also end the flips with and extra half flip so that I catch the remote from the opposite end I released but that's not so impressive looking

Vor 3 Tage
lastwordindicator
lastwordindicator

"The Earth is Stable" ? Between global wobble, earth quakes, humans shifting trillions of tons of very dense material to and from different points of the globe, tsunamis, and launching millions of tons of material in to space and off of the planet all together. I could see the creation of a perfect storm where a large volcanic eruption or a small asteroid impact could send our planet into a flip.

Vor 3 Tage
Azriel Galila
Azriel Galila

So what happens when the Polar ice caps melt and the rotation of maximum inertia changes?

Vor 3 Tage
Daryl Lect
Daryl Lect

*_The Bizarre Behavior of Counter-Rotating Wing Nuts_*

Vor 3 Tage
Buck The Banjo Player
Buck The Banjo Player

All bodies eventually flip........work on that

Vor 3 Tage
Dalton Duncan
Dalton Duncan

So, does this mean if you built a space elevator that you would introduce an alternate axis of spin to the earth, and could that cause the earth to flip?

Vor 3 Tage
JDub
JDub

"......and that is stable". says who? Deepest hole drilled into earth is mere 8 miles deep. If the core is liquid it can shift, we just saw what happened to the liquid filled cylinder. So much for your smugness. 🤨

Vor 3 Tage
Naraske
Naraske

but it's not liquid, at least that's what it seems. the outer core that is liquid only

Vor 2 Tage
Uden One-Eye
Uden One-Eye

So I just took a pack of cigarettes... and flipped it so that I caught it by the same side I let go of, and it didn't do the half spin. HA. "Nothing you can do to stop it..."

Vor 4 Tage
Tan Thien Nguyen
Tan Thien Nguyen

How many secret have U....?

Vor 4 Tage
Partha Das
Partha Das

Exquisitely demonstrated!! Thanks Dr. Muller for such fascinating videos about the counter intuitive rotating bodies.

Vor 4 Tage
A
A

STOP THE MUSIC BEHIND THE VOICE......... ITS IRRI AND DISTURBING.

Vor 4 Tage
Robell Yosief
Robell Yosief

Could we use that to redirect an astroid?

Vor 4 Tage
David Campbell
David Campbell

Two awesome explanations of physical phenomena, and I understand them both. Outstanding.

Vor 4 Tage
MORONews
MORONews

So how long before the earth shifts on it axis?

Vor 4 Tage
SuperStone
SuperStone

This entire channel could be an elaborately constructed hoax and I wouldn’t be able to tell the difference. This stuff is so weird.

Vor 4 Tage
Richard Grant
Richard Grant

Extremely well presented - a fascinating subject.

Vor 4 Tage
Richard Grant
Richard Grant

He did get his 2nd and 3rd axes mixed up..........

Vor 4 Tage
crumbles
crumbles

so why do the poles flip / move?

Vor 5 Tage
JDub
JDub

@crumbles. exactly. If the core is liquid then it can shift just as demonstrated by the liquid filled cylinder in the video. So much for earth "is stable" comment.

Vor 3 Tage
Max Bants
Max Bants

does this stability apply to the core which may not be as uniform as we once thought it was? Also now i think about it, does the core have its own spin, or is it in lockstep with the crust?

Vor 5 Tage
JDub
JDub

Max Bants No, same here. The time scale of this event is so large it would be silly to actively worry about it. 😎 I’m not worrying about the sun going out either. 😃

Vor 3 Tage
Max Bants
Max Bants

@JDub Is it weird the concept that the earth flips intermittently is more fascinating to me, than worrying?

Vor 3 Tage
JDub
JDub

Answer - No one knows. Only theory can be offered. BTW Liquid shifts so flip should be possible as demonstrated by the video he provided.

Vor 3 Tage
Saxxonknight
Saxxonknight

Was going to say, I'd observed this flipping a hammer, racket & other objects since I was a kid. Russkies didn't discover it by no means.

Vor 5 Tage
HellfireHammer
HellfireHammer

So hypothetically....with shifts in tectonic plates inevitably changing where mass is concentrated, the Earth really COULD flip no? I mean....It might take a while but...

Vor 5 Tage
HellfireHammer
HellfireHammer

@Azriel Galila you seem upset. And still don't understand. Take a breath. You're not doing well.

Vor 3 Tage
Azriel Galila
Azriel Galila

HellfireHammer I never said it did, you Idiot!

Vor 3 Tage
HellfireHammer
HellfireHammer

@Azriel Galila I'm sorry that you don't understand that when ice melts its mass doesn't change 😬

Vor 3 Tage
Azriel Galila
Azriel Galila

HellfireHammer Partner, you better go back to Grade 4 and learn to read like and adult...eventually!

Vor 3 Tage
HellfireHammer
HellfireHammer

@Azriel Galila um.....when ice melts in a glass of water, does the water level rise, lower, or remain the same? Before you answer...do it.

Vor 3 Tage
Orion Campos
Orion Campos

That was very good! Thank you.

Vor 5 Tage
Jake Kay
Jake Kay

so if we made a MASSIVE concrete dam somewhere in the world away from the equator does that mean it could potentially change the maximum point of inertia on earth?

Vor 5 Tage
Ludovic Lemaignen
Ludovic Lemaignen

How about plate tectonics and super continents?

Vor 5 Tage
Dennis Yegon
Dennis Yegon

what if the rounded piece had nuts on both sides

Vor 5 Tage
Halfman Halfamazing
Halfman Halfamazing

What happens when the continents move? Will that change earth’s moment of inertia?

Vor 5 Tage
Halfman Halfamazing
Halfman Halfamazing

Pawan Dahiya thx

Vor 4 Tage
Pawan Dahiya
Pawan Dahiya

@Halfman Halfamazing through water... when one continent moves the water absorbes that extra bit of energy at first and then it exerts that energy on to other continents.

Vor 4 Tage
Halfman Halfamazing
Halfman Halfamazing

Pawan Dahiya how?

Vor 4 Tage
Pawan Dahiya
Pawan Dahiya

yeah but they happen so slowly that it gives ample time for earth to counterbalance it.

Vor 4 Tage
Mark Godfrey
Mark Godfrey

Great explanation - I want to try this on a trampoline

Vor 5 Tage
adriandgoh172
adriandgoh172

It seems the axis that twists is because its unbalanced

Vor 5 Tage
Hans de Groot
Hans de Groot

amazing.

Vor 6 Tage
Jocelyn Brisebois
Jocelyn Brisebois

I'm glad to see that a shape like the earth like the ball cannot reverse its geological poles, the magnetic poles only, although there is an Amerindian prophecy I think that says that the sun will rise from the east but will also lie in the east.

Vor 6 Tage
J. Omega Escobedo Alva
J. Omega Escobedo Alva

No compañero. Esa explicación solo se puede dar deduciendo las ecuaciones de cuerpos rígidos en el espacio, y no es un secreto, se conoce desde hace siglos

Vor 6 Tage
Peter A. Blacksberg
Peter A. Blacksberg

Curious and wonderous. Watch and learn

Vor 6 Tage
Mikey Hansberry
Mikey Hansberry

That can be used to toss another and another and leap

Vor 6 Tage
Andre Fecteau
Andre Fecteau

I've been wondering what makes cars crash? This explains it perfectly, watch this video, you see if the car makes a small right turn, it creates a rotation to the left, oversteer...as the car attempts to "flip"...yeah, rotating bodies on a fixed plane is a driveline, axle, you heard it here 1st. https://www.youtube.com/watch?v=vaJj4zBg8cc

Vor 6 Tage
Francis Saffell
Francis Saffell

Okay Matrix, BUSTED!.... Got ya!

Vor 6 Tage
Jacob Lee
Jacob Lee

Dang, he's pretty good at flipping racquets I've been playing tennis for years and I'm still afraid of dropping it (idk why...)

Vor 6 Tage
Aaron Cooper
Aaron Cooper

I’ve noticed this effect with a fidget spinner.

Vor 6 Tage
Tom M
Tom M

Unaxial Anistopy

Vor 7 Tage
fillabong
fillabong

Its 1am. Why am I watching this youtube 🤦‍♂️

Vor 7 Tage
Tesla D'Christo
Tesla D'Christo

the Bible indicates that in the last days people will not be able to tell the seasons apart

Vor 7 Tage
Tesla D'Christo
Tesla D'Christo

Hugo Fuguselv also I want you to show me the Bible verses that are relative to those things because I’m pretty sure you are a liar.

Vor 5 Tage
Tesla D'Christo
Tesla D'Christo

Hugo Fuguselv sounds like you just hate the Bible because you believe the lies that are in it. And can’t distinguish the truth from perversion in the scriptures.

Vor 5 Tage
Hugo Fuguselv
Hugo Fuguselv

The Bible also says women should be silent especially in church. The Bible says it is OK to beat your slaves to near death, but not to death. The bible says that you and anyone who wants to, should kill your own son in public if he is a rebel. The Bible says a certain hooker preferred men with genitals like horses but with emissions like a donkey. In short, eff you for even mentioning that massively stepped on piece of human darkness. Since you love the bible, list all the verse numbers for the things I mention. Want more evil bible passages spoken by "God"? He will fill entire vallerys with human flesh and litter the mountain tops with their bones. Number?

Vor 5 Tage
Tesla D'Christo
Tesla D'Christo

like how you lied at the end to save your own ass.

Vor 7 Tage
Tesla D'Christo
Tesla D'Christo

the earth is already 8 degrees off axis it IS flipping slowly.

Vor 7 Tage
z1mt0n1x
z1mt0n1x

Spheres are stable and the geographical axis doesn't move, it's only the magnetic poles that's on the move. Funny how I read all this in a science magazine back in the 90's and people act like this is all new.

Vor 5 Tage
d p
d p

Mission Accomplished. Great intuitive explanation!

Vor 7 Tage
Alex Szatmary
Alex Szatmary

The spinning ball with extra weight on the side, can be applied at some special bullets. That is why the Russians kept secret for so long.

Vor 7 Tage
Tom M
Tom M

Isn't it true, though, that the iron core of the Earth will flip? When it does the poles will reverse. So when you read a compass, it will point to the south instead of the north.

Vor 7 Tage
Federico Olivares
Federico Olivares

And like so, the dreams of millions of australians of finally standing upright were shattered by physics

Vor 7 Tage
Loqman Kammreiter
Loqman Kammreiter

🇩🇪 Landau-Lifschitz ist ein Hammer 😎

Vor 7 Tage
DiZZy ViZiON
DiZZy ViZiON

Is it just me or was this not massively difficult to figure out? I mean, I couldn't put it into terms which would explain it to others but I could certainly understand within myself what was going on. It's a visual understanding- knowing how the behavior was being dictated by the motion and weight. Or is this perhaps just a dumb comment on a clever video?

Vor 7 Tage
Pawan Dahiya
Pawan Dahiya

the earth not gonna flip was easy.... those nuts though... they still flipping up my brain cells

Vor 4 Tage
Ryan MacFarlane
Ryan MacFarlane

Sure seems like the earth has flipped to me

Vor 7 Tage
Janis Vindavs
Janis Vindavs

Next big Dhanibekov flip will be performed by Earth's magnetic poles not the Earth itself. We will see Aurora borealis all over the place! :D

Vor 7 Tage

Nächstes Video

The Science Behind the Butterfly Effect

12:51

The Science Behind the Butterfly Effect

Veritasium

Aufrufe 1 800 000

Professor Eric Laithwaite: Magnetic River 1975

18:39

Professor Eric Laithwaite: Magnetic River 1975

Imperial College London

Aufrufe 3 400 000

Why Machines That Bend Are Better

12:52

Why Machines That Bend Are Better

Veritasium

Aufrufe 5 800 000

The Magic of Chemistry - with Andrew Szydlo

1:22:22

The Magic of Chemistry - with Andrew Szydlo

The Royal Institution

Aufrufe 5 100 000

Artificial Gravity

31:48

Artificial Gravity

Cool Worlds

Aufrufe 1 200 000

Parallel Worlds Probably Exist. Here’s Why

20:00

I'll Let Myself In: Tactics of Physical Pen Testers

44:56

I'll Let Myself In: Tactics of Physical Pen Testers

Wild West Hackin' Fest

Aufrufe 1 900 000

First Flight on Another Planet!

16:01

First Flight on Another Planet!

Veritasium

Aufrufe 1 900 000

WHAT VISE IS THE STRONGEST?

36:21

WHAT VISE IS THE STRONGEST?

Fireball Tool

Aufrufe 3 700 000

The Matter Of Antimatter: Answering The Cosmic Riddle Of Existence

1:39:21

Unsere KENNENLERNSTORY | Sara Dolunay

13:28

Unsere KENNENLERNSTORY | Sara Dolunay

Sara & Dolunay

Aufrufe 95 985

ALMAN bei der Pandemie

4:49

ALMAN bei der Pandemie

Phil Laude

Aufrufe 451 594

Eskimo Callboy Making of Hypa Hypa

6:16

Eskimo Callboy Making of Hypa Hypa

Eskimo Callboy

Aufrufe 156 018

(여자)아이들((G)I-DLE) - 'i'M THE TREND' Special Clip

3:27

(여자)아이들((G)I-DLE) - 'i'M THE TREND' Special Clip

(G)I-DLE (여자)아이들 (Official YouTube Channel)

Aufrufe 656 576

Red Velvet - IRENE & SEULGI 'Monster' MV

3:02