Gyroscopic Precession

  • Опубликовано:  5 лет назад
  • NOTE: This video will appear in a playlist on Smarter Every Day hence the references to Veritasium. Destin does lots of cool science stuff - check out his channel if you haven't already

    We have been collaborating on rotational motion, which is timely for some of the videos I've been doing lately. In this video I talk about gyroscopic precession - the "wobbling" of a spinning top around its axis.

    This is caused by the torque due to the object's weight. The big idea is that the torque vector increases angular momentum in the direction of torque. So if there is no angular momentum initially, it will cause the system to swing in such a direction that it is rotating with new angular momentum in the direction of the torque. However, if there was angular momentum to begin with, the torque will change the direction of that angular momentum by causing precession.
  • ОбразованиеОбразование
  • Длительность: 3:49
  • gyroscope  precession  gyroscopic precession  spinning  rotation  rotational motion  rotational  experiments  veritasium  spin  spinning top  wobble  torque  angular momentum  

Комментарии: 2 085

  • Abdullah bin Mohideen
    Abdullah bin Mohideen 3 дня назад

    total waste time wast

  • Syed Waqas Haider
    Syed Waqas Haider 8 дней назад

    torque = r x F and not F x r

  • Vista Panoramica by Lello
    Vista Panoramica by Lello 10 дней назад +1

    Hi there, first Of all contrata on The chanell!!! I love it!!!I'm a Airbus captain and I also fly helicopters and I always had a question about precession that nobody that I know can answer me...What is the speed that a disc must be turning to begin having the gyroscopic precession?!?

  • mahmud shawon
    mahmud shawon 13 дней назад

    Thank u , really learnt from you

  • oosveluzo levso
    oosveluzo levso 15 дней назад

    if you flip it, it will start turning the opposite direction, try it.

  • TomVinova
    TomVinova 16 дней назад

    Torque: easy to compute, makes no intuitive sense whatsoever lol

  • naveen reddi
    naveen reddi 16 дней назад

    Nailed it bro

  • Brian Skinner
    Brian Skinner 17 дней назад +1

    How humbling is the pursuit of knowledge. I came here after a several week long binge of spinning tops, and it took me that long to formulate the question relating to momentum and procession. I am a retired carpenter and the only math I have ever used is Trigonometry for stairs and rafters.

  • syed moris
    syed moris 17 дней назад

    The direction of angular momentum doesnt have any physical meaning the thumb rule is just a convention, right brothers?

  • Rumman Muhammad
    Rumman Muhammad 26 дней назад

    coincidentally 'torque is not as confused as you..take a break of wisdom..or u confuse us all..

  • The Mastermind
    The Mastermind 28 дней назад

    Why did the end scare me? I totally saw it coming

  • Jsux23 G
    Jsux23 G Месяц назад


  • Abhay Bhardwaj
    Abhay Bhardwaj Месяц назад

    vsauce "spinning" anyone?

  • Max Lake
    Max Lake Месяц назад

    torque vector of a black hole is the same.

  • scRam Jet
    scRam Jet Месяц назад

    isn't that because the wheel spins in the same speed as it falls rather than Gyroscopic Precession? Correct me i am probably wrong

  • Alfred Shitcock
    Alfred Shitcock Месяц назад

    Why does torque follow a right hand rule and not a left hand rule? Why isn't it symmetrical? I'm confused.

  • noonesperfect
    noonesperfect Месяц назад

    this is an awesome video....

  • 4one14
    4one14 Месяц назад

    Physics makes me smile :)

  • zenapsgas
    zenapsgas Месяц назад

    Rule of thumb: The direction of angular momentum follows the direction of the torque.

  • Frederick Stuart
    Frederick Stuart 2 месяца назад

    I almost got it

  • Hemanth Alluri
    Hemanth Alluri 2 месяца назад

    It's T = r x F, not F x r. Vector multiplication isn't commutative.

  • Andrej M
    Andrej M 2 месяца назад

    Hi, why please wheel must turn its axis in direction of total angular momentum? Thanks :)

  • re frigerator
    re frigerator 2 месяца назад

    not scared just laughing

  • Subarna Subedi
    Subarna Subedi 2 месяца назад

    Why does cross product give a vector which is perpendicular to a plane?

  • Jijo Paul
    Jijo Paul 2 месяца назад

    When the wheel is at rest, the gravity exerts a torque which makes the wheel to fall down. Now falling down means anti clockwise rotation and the angular momentum is in the same direction of the applied torque.

    And now we have the wheel spinning. At this time, we already have an angular momentum pointing in the leftward direction. Now we release the wheel. Gravity acts and applies an additional torque in the direction which is pointing outwards. So the angular momentum must increase. If I take that increased angular momentum portion, i still can't understand why the hell it is pointing upwards..?????

  • Billy Dodds
    Billy Dodds 2 месяца назад

    Fidget spinners brought me here. Kill me.

  • Pichael Moon
    Pichael Moon 2 месяца назад

    Hey Derek! that was so cool how you broke down the concept into simple easy to understand force vectors. Gyroscopic Precession with the bicycle wheel was something I really struggled to understand in physics class. Just wanted to say I figured out a way to explain the same concept and do the same demo with a fidget spinner on my channel so if you want to learn a little more, feel free to check it out :)

  • BoiSome
    BoiSome 2 месяца назад


  • heystirke300
    heystirke300 2 месяца назад

    i m mind fucked

  • DevinDTV
    DevinDTV 2 месяца назад

    So why doesn't it accelerate? Gravity is constantly pulling in a direction, so you'd think the procession should get faster and faster, right?

    GAAFTS 2 месяца назад

    Oooh Imma need this explained a bit slower for my young naïve mind.

  • Myfavsandlikes
    Myfavsandlikes 3 месяца назад

    Looks up angular momentum, looks up angular velocity, looks up why angular velocity vector is perpendicular, kills self.

  • Myfavsandlikes
    Myfavsandlikes 3 месяца назад

    I don't understand when he tries to explain angular momentum from dropping the wheel. I thought angular momentum required the object to be rotating?

  • aceyacey456
    aceyacey456 3 месяца назад

    This is how a single gimbal CMG works, right?

  • vogonford
    vogonford 3 месяца назад

    Got linked to this old video from Dirk from Veristablium. Always a pleasure!

  • Booster 884
    Booster 884 3 месяца назад

    I call BS, it's just a ghost riding a unicycle.

  • Martin S
    Martin S 3 месяца назад

    He should've used Zipp 808 firecrest wheels

  • Arnav Sharma
    Arnav Sharma 3 месяца назад

    which country are you from

  • Vishnu M Aiea
    Vishnu M Aiea 3 месяца назад

    So this is why you do it at the end of all videos ! Got it. But Michael does this too.

  • Danielle Matar
    Danielle Matar 3 месяца назад

    Almost got a heart attack from that ending xD

  • Luis M. Diaz Angulo
    Luis M. Diaz Angulo 3 месяца назад

    torque is r times F, not F times r. It is important if you are making a vector product because there is a change of sign.

  • Mario Cerguz
    Mario Cerguz 3 месяца назад

    but did you die!?

  • Money Editor
    Money Editor 3 месяца назад

    Why would the torque generated by the wheel rotation change the behaviour of the torque generated by gravity? I don't understand.

  • Crowne Productions
    Crowne Productions 3 месяца назад

    Should have added in some blood splatter FX at the end there Derek.

  • koushik sriram
    koushik sriram 3 месяца назад

    Can u explain where active and reactive gyroscopic couple will act?

  • mluleki mabuza
    mluleki mabuza 3 месяца назад

    that scared me, man!

  • MoosT
    MoosT 4 месяца назад +1

    What would happen if you spin it the other way around? In this case the right-hand-rule would point to the other direction or am I wrong?

    • Fresh Rock Papa-E
      Fresh Rock Papa-E 3 месяца назад

      The vectors would go the other way around. It would all be the same, except that the wheel would spin the other way around the rope.

  • Jonathan Carpio
    Jonathan Carpio 4 месяца назад

    42.0 blaze it

  • 파양
    파양 4 месяца назад +1

    wow i think that is best the best!!!

  • Rumman Muhammad
    Rumman Muhammad 4 месяца назад


  • Rumman Muhammad
    Rumman Muhammad 4 месяца назад

    too good, very well presented, dear sir..

  • Man In The Sky
    Man In The Sky 4 месяца назад

    I understand this was one of your earlier videos. But you could've explained 1) vectors have magnitude and direction not just direction. I understand that was just a mistake. 2) given you spent time to point out the torque vectors you should've made it more explicit that the gyro spin was because of the vector sum of the two torques. You mentioned them but didn't explain explicitly the vector sum points in the direction which would cause the gyro spin. Otherwise good video.

  • Arsal Hussain
    Arsal Hussain 4 месяца назад

    You Just Make Me Jump Off From My Chair In Ending...

  • Ashok Shrestha
    Ashok Shrestha 4 месяца назад

    i hope he isn't hurt badly .. that really scared me too.....

  • RubikMaster13
    RubikMaster13 4 месяца назад

    The thing I don't understand stand is this. Torque is angular force. You apply a torque to change the angular momentum of an object by increasing its angular velocity. If an object is rotating with a constant angular velocity, there is no torque being applied to it. The same as if an object is traveling with a constant velocity, there is no force applied to it. Once Derek has got the wheel spinning, there is no longer any torque on the wheel. So why does the wheel process instead of falling?

    DANG JOS 4 месяца назад

    That ending tho!

  • suresh nam
    suresh nam 4 месяца назад

    torque and angular momentum will be in the same direction.I guess so.

  • Super Miner Bilal
    Super Miner Bilal 4 месяца назад

    roblox death sound in the end lol

  • Super Miner Bilal
    Super Miner Bilal 4 месяца назад

    might do my science project on this

  • Nugacity TM
    Nugacity TM 5 месяцев назад

    does this gyroscopic precession also work on non metallic objects like plastic

  • Hogan Knott
    Hogan Knott 5 месяцев назад

    r cross f, not f times r.

  • PieZello
    PieZello 5 месяцев назад

    just take AP physics and you'll learn to hate this lol

  • Anime world
    Anime world 5 месяцев назад

    can we use gyroscope to create a vertical thrust ?..

    by putting a gyroscopic wheel between diamagnetic plates?

  • AMVaddictionist
    AMVaddictionist 5 месяцев назад

    Thank you for posting this video. Now I understand what my physics book is trying to tell me about precession.

  • atari7001
    atari7001 5 месяцев назад

    Newtonian physics presumes that the momentum of the spinning wheel cannot change no matter what we do to the position or location of the gyro. If we assume this to be true, then what happens to the energy of the system when a torque is applied such that the orientation of the axis is changed and the gyro is forcibly precessed?

    Since energy = force x distance, we've spent some energy, but where has it gone? The gyro will naturally resist this influence and come to a stop when the force is removed. Therefore, where has the energy gone? This to me seems even more mysterious than the precession motion itself.

  • Ron Beric
    Ron Beric 5 месяцев назад

    If you go to his website this week, I think it’s the final chance to get a copy of Woody Hyezmar’s woodworking Book, google it.

  • Jimmy Harry
    Jimmy Harry 6 месяцев назад +1

    1080p in 2012. I'm impressed

  • Fk Kwan
    Fk Kwan 6 месяцев назад

    why does the angular momentum have to be in that specific direction? why not the opposite?

  • kightremin
    kightremin 6 месяцев назад

    That hurts...

  • Joe Deglman
    Joe Deglman 6 месяцев назад

    So is the torque the same as a motor, I mean a metal object rotating in a magnetic field? What would happen if the entire wheel were plastic?   Is it a static electric force that creates the torque? It does have the right hand rule just like electricity in a wire.

  • teleturbo
    teleturbo 6 месяцев назад

    This explanation model is probably Walter Lewis work

  • Shivam Gupta
    Shivam Gupta 6 месяцев назад


  • Monica Robles
    Monica Robles 6 месяцев назад

    Question here!

    I want to analyze and explain precession, so I'll do the bike wheel project and all. However, I'm required to measure variants and all. What do I measure and how? The force applied is the controlled variant, and the torque is the dependable, which is the indepentable variant?

  • Pussystroker
    Pussystroker 7 месяцев назад +1

    OMFG I actually understood something in Physics. OMFG

  • M F
    M F 7 месяцев назад

    Nonsense. What you see here is how gravity is an electrical force.

  • BlackFiredDragon
    BlackFiredDragon 7 месяцев назад

    it's r x F, not F x r

  • kartikey nigam
    kartikey nigam 7 месяцев назад +1

    hey, its r x F not F x r

    • kartikey nigam
      kartikey nigam 7 месяцев назад

      +Even Jesus Hates You
      bro in case of vectors r x f and f x r makes difference as direction in both cases is different. For detailed info google "cross product"😁

    • Even Jesus Hates You
      Even Jesus Hates You 7 месяцев назад

      What the fuck's the difference?

  • 1.61803398875
    1.61803398875 7 месяцев назад

    I was always wondering with gyros if you introduce anti-torque to the suspended wheel ie force it not to spin around will it fall or will it stop rotating?

    • Hydar Zartash
      Hydar Zartash 6 месяцев назад

      it would fall, and then stop spinning, as the forces cancelled each other out, the torque would immediately take over, and the wheel would stop slowly

  • cafewithcake
    cafewithcake 7 месяцев назад

    hmmm please watch vsauce video at this its so different i dont know wich one is right

  • The Psyborg
    The Psyborg 7 месяцев назад


  • caqo2000
    caqo2000 7 месяцев назад

    (2:34) Could PLEASE anyone explain me why this mentioned torque goes/points that way (to the camera)?

  • Living the Dream
    Living the Dream 8 месяцев назад

    What if 2 or more gyroscope axles were connected at angles? Could the resulting torque be found by vector addition?

  • Mohammed Rayan
    Mohammed Rayan 8 месяцев назад

    warnnig jump scare at 3 42😱😨

  • Nash H-Aliyyi
    Nash H-Aliyyi 8 месяцев назад

    Sorry man this is not good explanation, whats up with memorizing hand rules,?! Just explain torque momentum and gravity falling effect that constantly battle!, resulting in new vector that moves also constantly side way= rotation.

  • Dentysta Statysta
    Dentysta Statysta 8 месяцев назад

    damned faggot i crapped my pants when the wheel had cut your head.

  • Nicholas Allan
    Nicholas Allan 8 месяцев назад

    Is it slowing down because of friction, or is it slowing down because the torque cause by gravity is opposing and slowing down the angular momentum? Would it not fall the way it did in a "frictionless" environment?

  • BOBlibob
    BOBlibob 8 месяцев назад

    What does this have to do with precision?

    • BOBlibob
      BOBlibob 8 месяцев назад

      +Grant Dever Ops, I forgot to delete my comment. I found out yesterday after studying gyroscopes. But thanks for the answer.

    • Grant Dever
      Grant Dever 8 месяцев назад

      precession not precision

  • Sheorajek
    Sheorajek 8 месяцев назад

    You mispronounced Veritasium.

  • Juno Chun
    Juno Chun 8 месяцев назад

    "I'm gonna bohrow some of their electric equipment," lol. Bohrow.

  • Frass Saeed
    Frass Saeed 8 месяцев назад

    Can someone explain to me what torque is? And why does it have the tendency to go out (perpendicular) toward me in the first place? Thanks!

    • adwait rawat
      adwait rawat 8 месяцев назад

      like force produces translatory motion, torqe produces rotation. it does not tend to go perpendicular it needs to be perpendicular to produce rotation. and it is a convention to convert rotatory vector into linear vectors for convenience by the right hand thumb rule. google it you will see.

  • Mash Fournier
    Mash Fournier 8 месяцев назад

    Tuen this fuclinh wheel ans shut up

  • Mathoma
    Mathoma 8 месяцев назад +2

    Although torque is a pseudovector, right?

    • Some1NamedMe
      Some1NamedMe 7 месяцев назад

      Genuine question: what is to say that torque is the pseudovector, not radius?

    • Mathoma
      Mathoma 8 месяцев назад

      +Joe Reven
      Indeed. You can define it as r ∧ F using the wedge product instead of the usual r x F using the cross product. The bivector seems more natural and direct since the rotation gets encoded right into the signed area as opposed to the cross product vector which is orthogonal to the plane of rotation.

    • Jo Reven
      Jo Reven 8 месяцев назад

      Isn't it a bivector?

    • MrSmiley
      MrSmiley 8 месяцев назад

      i thought its pterodactyl

    • Mathoma
      Mathoma 8 месяцев назад

      +Faruk, Bughaba
      Well, torque isn't really a _special_ vector because it's not a vector quantity at all. I think you mean that the pseudovector has an additional sign flip upon mirror reflection.

  • Blood Rage
    Blood Rage 9 месяцев назад

    wow your heart is bad, after spinning the wheel u get breathless.

    • Jo Reven
      Jo Reven 8 месяцев назад

      He seems fit to me.

  • Chittaranjan Srinivas Swaminathan
    Chittaranjan Srinivas Swaminathan 9 месяцев назад +1

    torque is r x F. and not F x r

  • Милан Павловић
    Милан Павловић 9 месяцев назад +2

    Hm, you are lucky because your camera has low latency, otherwise you will be sacrificed for science :)

  • Mdw 159
    Mdw 159 9 месяцев назад

    Great vids,, I just understand why it's rotating clockwise.... "The torque and angle of momentum" :D :D :D

  • BubblesPothowari
    BubblesPothowari 9 месяцев назад

    Torque : Force x Distance. Bicycle pedals. Simple Lever. Larger the distance between point of application and the pivot, larger the Torque.

    Precession. When a force, Torque is applied to a Gyroscope, the force effect precesses 90* in the direction of the rotation. Eg. When riding a bicycle, hands free, when I bank left, the the force applied at the top of the rim, pushing it left, precesses forward by 90* in the direction of the rotation of the wheel, and turns the wheel Left. ie The Torque on top of the rim, instead of left tilt, it gives left Yaw. That is precession.

  • Artemios Nicola
    Artemios Nicola 9 месяцев назад

    I think I'll do a more intuitive video describing the physical meaning of torque. Hold my beer.