The crazy way a slinky falls in slow motion

This is not just true of slinkies - if you release a steel rod from the top, the top really starts falling before the bottom. If you hit a tennis ball with a racket, a wave has to travel from the strings to your hand before you feel it - and the ball is well on its way to the net by this time. If you hit a golf ball, the ball is well on its way to the hole before you can feel it. Rigid bodies aren't truly rigid and understanding this is essential to understanding the way the world works


  • Veritasium
    VeritasiumVor 4 Tage

    This is an excerpt from a video I made 10 years ago - seemed like the perfect thing to show in vertical format. I was unaware Action Labs had recently made a video about the same thing. A regular video should be out Friday/Saturday this week.

  • Luke Snyder

    Luke Snyder

    Vor 40 Minuten

    not a "hack" a cheat. its ok to be there. its ok to be niether here nor there. its ok to be anywhere but the inside of the horizontal axis of the slinky when there are perturbations in the gravity of the bottom. its always now.

  • Luke Snyder

    Luke Snyder

    Vor 41 Minute


  • Jim Cronan

    Jim Cronan

    Vor Tag

    @John Jacob Astor here's something else that should be tried, what if both ends of the slinkies were attached to bearings ? Asto unload the twisting moment on the slinky then what would happen when released?

  • Pascal Lavoie

    Pascal Lavoie

    Vor Tag

    Same thing happen with the mould effect but with way less elasticity. Please Say this to electroboom and Steve mould ;)

  • stacie osborne

    stacie osborne

    Vor Tag

    First thing I think of is time travel. If you can suspend a part of the slinky mid fall, and that suspension is dependent on the overall length of the slinky- which is a measurable variable- then you could suspend the fall of the bottom end of the slinky as long as you want by lengthening or shortening the overall slinky. Effectively “stopping time” for the bottom end as long as you’d like? Does this make sense or am I stupid.

  • Corex
    CorexVor 49 Minuten

    If a game had ever decided to implement realistic slinky falls I would've called it unrealistic up until now

  • Ornery Hermit
    Ornery HermitVor Stunde

    Very cool.

  • Sidekix9o
    Sidekix9oVor Stunde

    You are too late I saw that already on the other Science channel

  • Derkach
    DerkachVor 4 Stunden

    I'd say it's because of contracting force is adding to the gravitational force, making the center of mass fall faster than normal fall. Because of this, the bottom part remains in position, as it counters the shift of center of mass. Similar to why you can't move forward by shifting the center of mass in space.

  • The PineApple
    The PineAppleVor 5 Stunden

    So if I had a heave duty slinky hanging like that, and a person hanging on to the bottom the of the slinky, they would just float there tension was released above?

  • Hal Weilbrenner
    Hal WeilbrennerVor 5 Stunden

    That's really strange

  • henry chandler
    henry chandlerVor 5 Stunden

    Now explain why building 7 collapsed

  • katkat14kk
    katkat14kkVor 8 Stunden

    Did you notice how that Slinky also look like the vibrations in a magnetic field like the one that wraps around Earth.

  • hoiy vinosa
    hoiy vinosaVor 8 Stunden

    I remember doing this as a kid. We called it "magic" back then lol.

  • Matthew Heinlein
    Matthew HeinleinVor 8 Stunden

    Cool, but I'm not sure your explanation is spot on... I don't think we should to think of it as a each coil falling onto the next one; rather, it's that once a coil no longer has the upward tension force acting on it (meaning that the coils above it are no longer stretched), then the only force left is gravity. Maybe just semantics though...

  • hoiy vinosa

    hoiy vinosa

    Vor 8 Stunden


  • Isaac Wurtele
    Isaac WurteleVor 8 Stunden

    If you had like a really big slinky could you run or jump off it while it’s falling

  • Igor Kramer
    Igor KramerVor 9 Stunden

    Интересный факт

  • moimoi moi
    moimoi moiVor 9 Stunden

    now please attach a ball to the top and the bottom so we can finally test Galileo's thought experiment :)

  • TheAbashta
    TheAbashtaVor 9 Stunden

    I would like more short videos like this. New material would be nice too, but im ok with it being clips from old videos. Youve had some real gems over the years, and reminders dont hurt.

  • Junaid Khan
    Junaid KhanVor 10 Stunden

    Why doesn’t gravity pull the bottom?

  • XtreeM FaiL

    XtreeM FaiL

    Vor Stunde

    It does.

  • Jakob
    JakobVor 10 Stunden

    The matrix is broken

  • Rednassie
    RednassieVor 11 Stunden

    How about cutting the slinky midway when falling? The last part will never be pushed B)

  • Samaila Abdullahi
    Samaila AbdullahiVor 12 Stunden

    I am forever grateful to Dr IGUDIA on DElevel who cured me from herpes with his herbal medication, you are so real and trusted.

  • Mitul Bhale
    Mitul BhaleVor 12 Stunden

    This is why youtube was created

  • Pranav Joshi
    Pranav JoshiVor 12 Stunden

    Why does the bottom rotate though ? Is it that the force due to tension creates a torque on the part which is not falling then the part that is falling must acquire opposite angular momentum . And we can see that as the upper part is rotating opposite to lower part in the video .

  • Pranav Joshi
    Pranav JoshiVor 12 Stunden

    I have never played with slinky so I thought .. maybe it is just as we do it in academics .. F=kx but then this force will be variable and bottom would stay there only for a very small time but that's not the case.... then I looked at it again...yes F=kx is true but not for the whole slinky as it is deforming non uniformly . It is only for the part that is not falling + some small portion above it . The heap doesn't count as a part of the spring anymore . Also here k is changing but if we use the shearing modulus equation it becomes clear that the strain is same thus force is constant .

  • Shariar Tonmoy
    Shariar TonmoyVor 13 Stunden

    i recently talked to my friends about it and explained to them..🤩

  • Fredo Corleone
    Fredo CorleoneVor 13 Stunden

    Wow! It doesn't like gravity haha

  • vikrant chaudhary
    vikrant chaudharyVor 14 Stunden

    didn't think about the rotation before this. Nice!!

  • juicyNathan
    juicyNathanVor 15 Stunden

    Спасибо за видео, коммент в поддержку вашей работы

  • star sky
    star skyVor 15 Stunden


  • gingnose
    gingnoseVor 18 Stunden

    This single video taught me more than what I learned in the physic class at high school.

  • Aditya Kulkarni
    Aditya KulkarniVor 19 Stunden

    PLEASE make a video explaining gears of bicycle .WAITING for that.

  • Lies and Deceit
    Lies and DeceitVor 19 Stunden

    I legit thought he just started repeating himself.

  • Ernesto W
    Ernesto WVor 21 Stunde

    nah man this just a bug god forgot to fix

  • Kuhen Elan
    Kuhen ElanVor 22 Stunden

    Look at this fancy guy with his Ferragamo belt.

  • Zaxton Hong
    Zaxton HongVor 22 Stunden

    No cameramen were hit by slinkies in the making of this video Probably

  • Strange Duck
    Strange DuckVor 23 Stunden

    me reading comments: "i had no idea there were so many slinky experts in the world"

  • Dmitry Berdnikov
    Dmitry BerdnikovVor Tag

    Very interesting. It is so counterintuitive though.

  • Rational Agent
    Rational AgentVor Tag

    Coyote time is real

  • The One Called Nick
    The One Called NickVor Tag

    If you look closely at where the slinky is turning, you can see that it's actually another mould effect.... I think it's time for him to join xD

  • jose fabian espiosa diaz
    jose fabian espiosa diazVor Tag

    hello friend, i really like your videos a lot, i think they are great, they make me see nature in a different way, i would like to know what you think about erwin schrödinger's essay entitled "what is life".

  • SlownLoud97
    SlownLoud97Vor Tag

    how the hell i see an ad on a short 🤣 great video tho 💯💯👏🏼👏🏼

  • shigaraja
    shigarajaVor Tag

    @Veritasium so i had a fun thought today. i understand why leaves are green, but i had to sit there and ask myself... why are they not black? it seems like it would be better for light absorption and there are some black plants. so why didn't they take hold as the better species?

  • titaniumjackal
    titaniumjackalVor Tag

    Create a channel that's nothing but slo-mo slinky drops, and I'll watch it.

  • Deedee Mao
    Deedee MaoVor Tag

    Electromagnetic levitation mechanics

  • SureelaSuwar
    SureelaSuwarVor Tag

    So slinky at the bottom is weightless?

  • The Scattered Man
    The Scattered ManVor Tag

    Okay, I definitely need to TRY this on my channel... I don't know if I have access to decent SLOOOOW MOOTION tech, but I'll give it a try. (Not that I don't believe you, ... and the explanation makes sense... but Science is about REPEATABLE results, right? :) )

  • Eli Bowen
    Eli BowenVor Tag

    You should do a video over Aristotle’s wheel paradox !

  • Ameha K
    Ameha KVor Tag

    So much awesomeness

  • Ryan Wilson
    Ryan WilsonVor Tag

    Is the atomic number of VE 42 because, 42 is the answer to life the universe and everything? A Hitchhikers Guide to the Galaxy Reference?

  • The Scattered Man

    The Scattered Man

    Vor Tag

    I think so. Either that or somebody is inordinately fond of molybdenum. :)

  • Percy Faith
    Percy FaithVor Tag

    That is pretty cool Galileo 2.

  • Bobazo Vamoh Chile
    Bobazo Vamoh ChileVor Tag

    Fun fact: Since the center of mass of the slinky (which is in the middle approx) should fall with the acceleration of gravity (9,8 m/s^2) and the bottom is motionless, the top of the slinky is falling with an acceleration twice the gravity (19,6 m/s^2)

  • The Scattered Man

    The Scattered Man

    Vor Tag

    Hmmm... I'll have to think about that one. I would think it would depend on the spring constant of the slinky. Or maybe not. Certainly the length of time required before the whole spring starts to ACT like a "rigid body" again depends on the spring constant.

  • neppler 1
    neppler 1Vor Tag

    His explanation isnt intuitive and does not explain the scenario fully . Correctly, the center of mass of the slinky is simply accelerating with gravity as a rigid body would.

  • Stephen Robinson
    Stephen RobinsonVor Tag

    I truly did not know that!😳

  • Harry Nicholas
    Harry NicholasVor Tag

    i just quoted this in a videeo about "the mould effect", have you done anything on chain fountains? i said the loop is due to the slinky effect, the looped part doesn't know it should be falling, so i tries to maintain height.

  • Vedant Kulkarni
    Vedant KulkarniVor Tag

    Hey veritasium , great video again !!!, Can u make a video on mould effect ?

  • Jonathan Fan
    Jonathan FanVor Tag

    So if I drop a rope the bottom won't fall when I let go? I think it is because the slinky is actually pulling the bottom up before the the top reaches the bottom. Your explanation seems wrong.

  • KIM-BONG UN*united nations*
    KIM-BONG UN*united nations*Vor Tag


  • The Scattered Man

    The Scattered Man

    Vor Tag


  • Henrik
    HenrikVor Tag

    I love shorts. So much information in such a short time. Leaves more time to wonder and piece stuff together by myself.

  • jsl151850b
    jsl151850bVor Tag

    The center of mass is falling as if it were a solid sphere of equal mass. The top is falling faster than 10m/s/s due to the Slinky un-stretching.

  • Oogha Boogha
    Oogha BooghaVor Tag

    You should make a Vertasium Shorts channel and post short videos like these there :)

  • Сергей Петровских
    Сергей ПетровскихVor Tag

    Дерек лучший !!! Респект и уважение за труд во благо знания!!!

  • Squirtcake
    SquirtcakeVor Tag

    What would happen if you accelarated a slinky to the speed of light downward while it was holding it's own weight?

  • Smuci
    SmuciVor Tag

    He used the time warp scan for this video its obvious

  • Navi
    NaviVor Tag


  • Cai Shang-Hao
    Cai Shang-HaoVor Tag

    Thanks for your share

  • Fransisco Wijaya
    Fransisco WijayaVor Tag

    Yeah bro gravity is illusion

  • Phaesiq
    PhaesiqVor Tag

    Action labs got SMOKED.

  • Ultra Scissor
    Ultra ScissorVor Tag

    Does this mean there is an upwards force acting on the bottom ring of the slinky? Where is that force coming from? We know gravity has a downwards force on the bottom ring... how is the ring above it pulling it upwards? I would've thought all rings should fall down simultaneously at the same rate. Can anyone explain?

  • Oceansteader Kelp
    Oceansteader KelpVor Tag

    Saw someone else do this.

  • CrusaderGutsy
    CrusaderGutsyVor Tag

    The thumbnail made it look like the dude was hailing hitler lol

  • MrSmitheroons
    MrSmitheroonsVor Tag

    I think the twisting/falling/repositioning of the top portion must exert an upward or contracting force to counteract the force of gravity acting along the whole slinky... Otherwise we should see the bottom start to move down toward the ground a bit sooner. Right?

  • The Scattered Man

    The Scattered Man

    Vor Tag

    Sounds right, yes. The spring is still pulling UP on the bottom for a while. The rate at which the ... ummm, "loss of having something above you to pull up Effect" propagates towards the bottom is going to depend on the spring constant of the spring/slinky. So for a tight spring, the time between it being released at the top and starting to fall at the bottom is going to be minimal.

  • Vetera Novus
    Vetera NovusVor Tag

    If you had a slinky that was 35280 meters long, it could take as much as a hour before the bottom began to fall. 9.8m/s * 3600s = 35280 meters.

  • The Scattered Man

    The Scattered Man

    Vor Tag

    The rate at which the effect (of falling) propagates down the spring depends mostly on the "spring constant" of the spring. (i.e. how 'tight' it is). If you use something like the springs they use in some garage doors, the delay between the top beginning to fall and the bottom beginning to fall is going to be negligible in most cases. For a slinky... well, I'll have to get back to you after doing some tests on the spring constant of a slinky. But I think it's pretty clear (if you think of a tight spring versus a loose one) that the speed of the effect has more to do with the spring than with the gravitational constant. (I THINK... I haven't actually tried it. :) )

  • XtreeM FaiL

    XtreeM FaiL

    Vor Tag

    Average speed 35km/h? I think not. Felix Baumgartner jump from 39km.

  • Vaibhav Gehlot
    Vaibhav GehlotVor Tag

    So does this means that the top accelerates more then g

  • Louisa Now
    Louisa NowVor Tag

    The excerpts are good, too. Always enjoy learning from your videos.🌟🌟🌟🌟🌟

  • Quantum Droid
    Quantum DroidVor Tag

    lol The mental state of the avarage youtube commenter rivals with a cube of sugar...shame on you people

  • sivan narayanan sivan narayanan
    sivan narayanan sivan narayananVor Tag

    One of the most awesome videos.

  • Astonishing Astronomy
    Astonishing AstronomyVor Tag

    DEREK wearing formals to demonstrate a slinky falling😁👏

  • Amiya Sarkar
    Amiya SarkarVor Tag

    Great illustration. I'd like to draw a parallel with the checking of pulse in medical examination. It's the pulse wave propagation that we feel not the blood per se. Blood appears at the examination site much later than the pulse.

  • Dragon Landlord
    Dragon LandlordVor Tag

    Is this the same reason it expands when you roll it across the floor?

  • nope.
    nope.Vor Tag

    gravity: AM I A JOKE TO YOU?

  • zerg terran
    zerg terranVor Tag


  • Robert Smith
    Robert SmithVor Tag

    I can't stand the DElevel algorithm BS. I have Veritaserum marked to receive notifications for ALL videos and they didn't for this one. DElevel sucks.

  • Max Weger
    Max WegerVor Tag

    My BOI rockin' da Ferregamo belt

  • Harsh
    HarshVor Tag


  • Curious Doc
    Curious DocVor Tag

    One of the all time great videos from the channel. Simple concept but fascinating. Great to be reminded of it!

  • Joseph Wallace
    Joseph WallaceVor Tag

    Huh, that's interesting, makes sense. Thank you

  • Akshay P
    Akshay PVor Tag

    Doesn't gravity pull it down

  • itshafix
    itshafixVor Tag

    Thank you man of science

  • Vinod Mehra
    Vinod MehraVor Tag

    But still, where is the gravity?

  • Navneet Nair
    Navneet NairVor Tag

    Why doesn't gravity just pull everything down at the same time while wave is propagating. Seems very counter intuitive to me... Almost as if gravity is only an illusion!

  • XtreeM FaiL

    XtreeM FaiL

    Vor Tag

    Gravity is pulling everything at the same time.