Why Gravity is NOT a Force

The General Theory of Relativity tells us gravity is not a force, gravitational fields don't exist. Objects tend to move on straight paths through curved spacetime. Thanks to Caséta by Lutron for sponsoring this video. Find out more at: www.lutron.com/veritasium
Huge thanks to Prof. Geraint Lewis for hours of consulting on this video so I could get these ideas straight in my own brain. Check out his FIstart channel: ve42.co/gfl or his books: ve42.co/GFLbooks
Amazing VFX, compositing, and editing by Jonny Hyman
2D animations by Ivàn Tello
Filmed by Steven Warren and Raquel Nuno
Special thanks to Petr Lebedev for reviews and script consultation
Music by Jonny Hyman and from Epidemic Sound epidemicsound.com
Rocket made by Goodnight and Co.
Screen images in rocket by Geoff Barrett
Slow motion rocket exhaust footage from Joe Barnard at BPS.Space
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  • Here's a question I've seen a lot in comments: OK, I'm accelerating up but then shouldn't someone on the other side of the globe fall off? No, here's why: Either watch again from 8:28 or read what I've written below... Spacetime is curved - it curves the opposite direction on the other side of the Earth. Neither us on this side of the Earth nor they on the other side are changing our spacial coordinates - we're not moving up, they're not moving down - Earth isn't flying into one of us. BUT we both ARE accelerating. In curved spacetime you have to accelerate just to remain stationary. The traditional definition of acceleration is something changing its velocity. In general relativity you have to embrace a new definition of acceleration: it means deviating from a geodesic - not going on a straight line path through spacetime. Near the Earth a geodesic is a parabola so unless you're moving in a parabolic arc (like on a zero-g plane) you are accelerating. This definition is the same as the old one so if you're accelerating in deep space then your velocity is changing. *BUT*... if you are near a large mass you are in curved spacetime, now acceleration your velocity is changing. You can stay stationary relative to Earth's surface and still be accelerating. This is because your acceleration should be measured not relative to the Earth's surface but relative to free-falling objects - they are inertial observers. Imagine this - I'm in deep space and I make horizontal rows and rows of stationary golf balls. Then I hop in my rocket and accelerate up through them. Just think about what that looks like. Now my rocket is back on Earth just sitting there. I freeze time for a sec and make horizontal rows and rows of golf balls up into the atmosphere. Now unfreeze time. What do you see? If you just look at the golf balls and the rocket ship it looks the same as the situation in space where the golf balls were stationary and the rocket was accelerating. Einstein's point was the golf balls have the better claim as the "stationary" thing since their experience is just like the golf balls in deep space - no forces experienced. The rocket on Earth is just like the rocket in space. It feels a force and hence an acceleration.

    VeritasiumVeritasium15 päivää sitten
    • @JAW BL4Z3R Space time curvature causes the effect which is called gravity force in Newton's law of gravity.

      D DD DPäivä sitten
    • 8

      adorableadorable7 päivää sitten
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      adorableadorable7 päivää sitten
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      adorableadorable7 päivää sitten
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      adorableadorable7 päivää sitten
  • just one little flaw in this video. You can't turn on the rocket thrusters in space, I mean you can but it would be pointless, you are in space already moving in a constant speed. And the thrusters would propel you in front, but there is nothing behind you so you can't propel yourself, or am I wrong here?

    HyoryujiHyoryuji4 tuntia sitten
  • RESEARCH THE TRUE FLAT EARTH TOPIC NOW!!! NASA LIES AND LAUGHS ALL THE WAY TO THE BANK!! WE GIVE THEM $19 BILLION WHILE THEY GIVE US ARTIST RENDERINGS, CONCEPTIONS, COMPOSITES, CGI AND ANIMATIONS!!! Wake up already!!

    ramon ortizramon ortiz4 tuntia sitten
  • If the independent mass of the earth weighing down on the fabric of space time is what produces a curvature of space time resulting in gravity then what OBJECTS OF GREAT MASS BECAME PRESENT AFTER THE ALLEGED BIG BANG TO BEND THE FABRIC OF SPACE TIME TO CREATE GRAVITY ITSELF THAT THEN PULLED IN DEBRIS TO ASSEMBLE THE EARTH, MOON AND STARS????? Then explain who this curvature of space time contradicts itself with retrograde!!? If gravity itself pulls all matter to its center how then are we taught that the universe is expanding??? Liars!!!

    ramon ortizramon ortiz4 tuntia sitten
  • You are a blatant liar!! Gravity is not a force or occurrence!! It is a farce!! To date some 500+ years gravity itself has NEVER BEEN DIRECTLY DETECTED PER CURRENT, FIELD, WAVE, BEAM, RAY OR PARTICLE ON THE EARTH!!! You teach gravity as fact when in truth it isnt fact but on agreed upon THEORY!! We are only taught about what gravity does, results or makes happen. WE ARE NEVER TAUGHT ABOUT WHAT GRAVITY IS ITSELF BECAUSE GRAVITY ITSELF HAS NO INDEPENDENT PRESENCE OR SUBSTANCE TO DIRECTLY DETECT!!!

    ramon ortizramon ortiz4 tuntia sitten
  • Gravity is like the centrifugal force: not technically a real force, but you can pretend that it is and still get accurate results

    VisaVisa5 tuntia sitten
  • Awesome video! But I have a question for anyone willing to shed some light on this. One thing that was not mentioned in the view presented in the video was kinetic energy. How can one say that free falling should be the same thing as staying still in space. In one case the subject has kinetic energy, in the other it has not. I am not familiar with the physics of GR but as an engineer (and by this inherently bound to the Newtonian view 😅) I am sure that one object has kinetic energy and the other has not, thus I cannot understand how these two cases are to be seen as equals. I am 100% certain I am not smarter than Einstein obviously, so any help to pinpoint where is the error in my thinking?! Thanks for the help!

    Rafael DomenikosRafael Domenikos5 tuntia sitten
  • So then wth is a “gravitation wave”?? Or whatever the heck they’re calling it when they say they’ve measured gravity. If gravity is not a force how can there be a gravity wave?

    painmt651painmt6515 tuntia sitten
  • Gravity is an actual force, it has nothing to do with the geometry of space or curved space. A new theory of gravity was just published in a new ebook, " The Universe 20/20" on amazon, everything you think you know about gravity is now obsolete.

    SCOTT DCSCOTT DC5 tuntia sitten
  • Where this falls apart is in what has to happen to the rocket to maintain 1G apparent. To do this, the rocket must remain in acceleration. In a fairly short amount of time, the rocket would be at light speed. What then? So I think it's more appropriate to think of gravity more like buoyancy. An object is influencing the Higgs field to the exact proportion to the amount of space it displaces. The proof is a simple one. We don't continue to accelerate to maintain 1G. Therefore we must be exerting a "force" on the Higgs field to maintain our cosmic buoyancy.

    Twelve Wing ProductionsTwelve Wing Productions6 tuntia sitten
  • Something always seemed a bit off about gravity to me but this explanation of it put things into focus that were a bit hazy prior to this particular explanation, thank you

    Jimmy MooreJimmy Moore6 tuntia sitten
  • I might tell this to my science teacher

    BP_CherryBlossomTreeBP_CherryBlossomTree6 tuntia sitten
  • 'THEORY' means it's not even proven. The End.

    RR PLAN CRR PLAN C7 tuntia sitten
    • @Michael Cahoon It's about the Frequencies. Life as we know it would not exist without the frequencies that bind everything togther. The earth is not flat and it's not round either.. It's not really physical. The definition /word physical is Man Made MM 33. So you don't really know what it is and neither do I. I have a pretty good idea though. Prove all that wrong.

      RR PLAN CRR PLAN C5 tuntia sitten
    • @Michael Cahoon So you are ignoring me now then it seems? That tells me a great deal.

      RR PLAN CRR PLAN C5 tuntia sitten
    • @Aaron Jacobs Thanks...! Get back to me if you ever find out.

      Michael CahoonMichael Cahoon5 tuntia sitten
    • @Michael Cahoon well, the infinite density of the singularly is what causes the phenomenon (I don't know exactly as I haven't spent nearly long enough studying this so I'm not confident answering you)

      Aaron JacobsAaron Jacobs5 tuntia sitten
    • @Aaron Jacobs So, the crushing density of the object that initiates the 'black hole' is in fact the instigator of the force that pulls on anything that comes near it's singularity. Is that correct?

      Michael CahoonMichael Cahoon6 tuntia sitten
  • Does this infer that time is technically a force instead of gravity?

    scubahunter00scubahunter008 tuntia sitten
  • Wow, Phoebe was actually right, we are not being pulled, but pushed by Earth

    losmikeslosmikes8 tuntia sitten
  • Yeah screw you veritasium, you think you know better than me?

    Raiyan TalukderRaiyan Talukder8 tuntia sitten
  • This video is great!! Would someone care to please explain why the gravity would be pushing up against my feet and against someone elses feet on the opposite side of the earth? Would the direction of the acceleration not be uneven/at an angle or is this due to the inertial mass countering it? Basically why is the angle of the force not noticeable?

    Shannon ButlerShannon Butler8 tuntia sitten
  • That “illusion” hurts... a lot!

    Alex RiveraAlex Rivera9 tuntia sitten
  • What I get from this is that the sci-fi "anti-gravity" devices are impossible.

    Trond ZaphiraxTrond Zaphirax10 tuntia sitten
  • Wow... incredible..

    Egxon Shabani - ComposerEgxon Shabani - Composer10 tuntia sitten
  • As long as I've known Derek he's consistently asked the difficult questions. This video challenged me, and taught me many things. I want to try the eclipse photo now. Impressed Eddington did it in 1919.

    noodle doodlenoodle doodle10 tuntia sitten
  • right wing and conspiracy nutters: "gravity doesn't exist and this video is proof, got ya"

    asdwaetdasdwaetd11 tuntia sitten
    • right wing? If you really think that, then you're just projecting.

      Willoughby KrenzteinburgWilloughby Krenzteinburg10 tuntia sitten
  • Excellent explanation! but, What about tides?

    Max FuentealbaMax Fuentealba11 tuntia sitten
  • ha ha ha I know... I'm always right..... sad newton noises

    Albert EinsteinAlbert Einstein11 tuntia sitten
  • One of the best teachers

    Anwar ZebAnwar Zeb11 tuntia sitten
  • Good teacher

    Anwar ZebAnwar Zeb11 tuntia sitten
  • Step 1. Pause the video at 12:31 Step 2. Set the speed at 0,5 Step 3. Enjoy 🤣

    Mihai DumaMihai Duma12 tuntia sitten
  • 13:57 bending light would apply easily if the distance travel of the light increased?

    HyoryujiHyoryuji12 tuntia sitten
  • you just killed Newton Bro

    HyoryujiHyoryuji12 tuntia sitten
  • This is one of your best Derek. You’re an outstanding “explainer,” as is Diana. Well done. I watched your video a few times and suddenly ... “click”.... the lights went on.

    REMEREME12 tuntia sitten
  • Yo

    Prithivi RajPrithivi Raj12 tuntia sitten
  • Element 115 can bend space time

    Quinn HazeQuinn Haze12 tuntia sitten
  • So you say it's a deformation in spacetime which makes masses attract each other as gravity is no force. I wonder which force bends spacetime in the first place if it's not gravity. 😵🥴

    Osmone EveronyOsmone Everony12 tuntia sitten
  • Literally this video is just blew up my mind. After watching this video, while imagining all those he explained... Wow😍😍 You just gave me a new perspective of seeing the worl

    dcoog anmldcoog anml13 tuntia sitten
  • Can you explain black holes next?

    Ryan ByerRyan Byer13 tuntia sitten
    • This is so beautiful, I have looked at this for 5th time.

      dcoog anmldcoog anml13 tuntia sitten
  • So if there is no such thing like a gravitation field, how can there be gravitation waves? Waves do need a field, don't they? If gravity is no force, so how can it be compensated by a counterforce? Due to Newton force = counterforce. What is a force? If a force can accelerate a body then any force shall curve spacetime. So any force is an illusion? Strange video this!

    Holdin MuhlHoldin Muhl13 tuntia sitten
  • Charge: Gravity, it's working against me.

    Sahana JoshiSahana Joshi13 tuntia sitten
  • Wow, all concept are explained very well and in a very entertaining way. However every time it says acceleration and gravity are completely equivalent, it seems to me it is missing something. I believe Einstein already pointed out that GR is valid only locally: two objects free falling in the elevator will get closer to each other, as the two people walking towards the north pole, this will not happen for the accelerating rocket. I might be wrong, but I think it makes some difference.

    ilkovilkov14 tuntia sitten
  • But what exactly is pushing atoms into eachother to a point where the almost fuse like in a Neutron Star? I get the Curved Spacetime thing but, thats an honest Question, what makes matter crushing into itself? Just a bent geodesic?

    Abara NiheiAbara Nihei14 tuntia sitten
  • Tell it to my physics teacher.

    Gabriel TobingGabriel Tobing14 tuntia sitten
  • Einstein also said: If you can't explain it simply, you don't understand it.

    L. WL. W14 tuntia sitten
  • What an idiot. Space doesn't exist. Our atmosplane would b sucked off and fill the available space. 2nd law of thermodynamics. Wake up. If theres pressurized air we need a container. Stop it sheeple. Its flat water isn't magical sticky bendy NASA water. Its flat tge way i have seen it in every puddle

    Bearapalegic BearBearapalegic Bear14 tuntia sitten
  • one of the best video and made it to simplify it for a basic person to understand how gravity works. salute to you dude.. u have done something many teachers in the world failed to explain.

    wajid abidwajid abid14 tuntia sitten
  • Goid job . It really highlights how particle physics is really imaginary interpretations that things like gradations and qaurks are really non existent it just helps us have random calculating prediction of probability that works at this space time moment. We witness the dream of dreams but your supposed to ignore that and lie to yourself about it. Pick and choose the observations that you will accept and ignore those that don't tell you the answer you want to see .lol I luv science though its always going to be limits that allow us to talk ourselves into and out of reality interpretation

    Dadson worldwideDadson worldwide15 tuntia sitten
  • Lol I thought those were casada switches... as if they sponsored you.... those things are sweet to replace 3ways and you get a dimmer switch.

    Bill DavisBill Davis15 tuntia sitten
  • I learned about general relativity in school and did not only generally understand many of the teachers Explanations, but was able to calculate many things with the corresponding formulas (i specifically remember that one of my final exams had the question: "how fast must a rocket with the length x be to fit into a garage of length y?"). But this Video gave me a level of understanding that i lacked before. Thank you for that. I think for calculating easy everyday stuff i'll stick to Newtonian physics though.

    HenrikHenrik16 tuntia sitten
  • Is really gravity is not a force but it is equal to mg how

    Ganesh tappita Tappita ganeshGanesh tappita Tappita ganesh16 tuntia sitten
  • 🤯🤯🤯

    AstroAstro17 tuntia sitten
  • Can´t we say the same thing for charges in an electrical field? There is no electrical forces when a charge is running due to the "illusion of an electrical field", it is just space-time distortions, or forming electro-desic. Well I guess everything is part o a model, and the model that we work out may accommodate, both views if well modeled. I believe the error between Newtonian and Einsteinian models in predicting the deviation of the light of stars, is just because the best adjustments were not made in the Newtonian models, for example (did they correct limit of speed and acceleration according to what they use in relativity?).

    The Circuit CrackerThe Circuit Cracker17 tuntia sitten
  • This is so beautiful, I have looked at this for 5th time.

    Filip PivoňkaFilip Pivoňka17 tuntia sitten
  • Defendant: "Your Honor--I have photos to prove that was a very steep hill; and according to Einstein I wasn't moving at all! It was your Officers standing next to their patrol cars with the radar guns that were coming towards ME at 200 MPH..."

    benjamin rodriguezbenjamin rodriguez17 tuntia sitten
  • I was just writing a script for a video about gravity, but you said it better than I could. Here's two ideas I had that you may want to include in a future video about gravity: I agree that the rolling a ball on a sheet illustration is misleading. Here's a better illustration: place a mass on the sheet as before, then roll a toy car on the curved sheet. The toy car travels along a geodesic. To explain how the earth can stay the same size despite the surface accelerating upwards, try drawing a space time diagram on the surface of a balloon or a ball. The surface of a fixed width object in a curved spacetime diagram will not travel along a geodesic. This will also show why someone on the opposite side of the earth doesn't fall off.

    Aaron KriegmanAaron Kriegman19 tuntia sitten
  • I feel like I don't like the use of the term 'SpaceTime' My mind tries to separate the two by default into its respective meanings and doesnt allow me to hold onto the whole picture. I think it would help to talk about larger planets with different g force accelerating at the same rate as earth. It sounds like a planet 10x the size of earth orbitting the sun could have the same acceleration, and be a planet capable to stand on.

    JuystaFanJuystaFan19 tuntia sitten
  • So what about the gravitons and gravitation waves?

    Mike GajewskiMike Gajewski19 tuntia sitten
  • Are we all just gonna ignore that guy who kicked Derek in the face?!? 12:30! 😮

    matthew schniedermatthew schnieder19 tuntia sitten
  • This video is a masterpiece. The best explanation of gravity on the internet currently.

    Pat RicePat Rice19 tuntia sitten
  • So what is gravity?

    L. WL. W20 tuntia sitten
  • IS someone know how to make ACCELARATION minus COORDINATES = ZERO ... because then I could stay static into spacetime and be immortal :) "VELOCITY Through TIME" = ZERO

    Daniel SiecińskiDaniel Sieciński20 tuntia sitten
  • Summary ... it All depends on the point of view ... or just DENSITY matter is matter ;)

    Daniel SiecińskiDaniel Sieciński20 tuntia sitten
  • Good is that a Earth give me a hand to equal my movment ... because other way I would be a sick ;)

    Daniel SiecińskiDaniel Sieciński20 tuntia sitten
  • Very good video. Btw, there is nothing called space & time in reality. It is only time. Even space is an illusion. Figure out how!

    Party SongsParty Songs21 tunti sitten
  • Should you not use two different objects of different weight for that lie? Feather and bowling ball? Does real life show you he is wrong? This is an attempt to account for Gravity being DEBUNKED, Facts remain facts if they are FACTS, This is the THIRD rendition of gravity. Newton, Einstein, Now the admittance that it's NOT a force. It was all a dream. Kills the Gas containment Theory stone DEAD. NO GRAVITY, Welcome to Flat non rotating EARTH.

    Barry DavisBarry Davis21 tunti sitten
    • @Barry Davis ah so telling you that we tested it on the moon is probably futile since you believe the moon landing was faked as well.

      Narf WhalsNarf Whals7 tuntia sitten
    • @Narf Whals Hahahahahahahahahaa nice one. I think Brian Cox nearly proved that but there was soooo much editing done to fool the unwary I doubled up with laughter.

      Barry DavisBarry Davis14 tuntia sitten
    • This is Einsteins gravity. A feather and a bowling ball fall at the same rate in a vacuum.

      Narf WhalsNarf Whals14 tuntia sitten
  • How does this idiot KNOW what it is like to go into a place nobody has ever been? Einstein never ever went into space so what was he studying? Space time is YOUR imagination NOT REALITY. Think about it BENDING TIME? Really? Bending space?? Yeah a cartoon to show you something NEVER WITNESSED, Calling weight gravity. And using the vomit comet to FAKE weightlessness.

    Barry DavisBarry Davis21 tunti sitten
  • Both the charges will radiate electro magnetic radiation because in the object there will be electrons which are moving of course we can't feel it but there exist tiny amount of electromagnetic radiationn

    SaiSanjana GurramSaiSanjana Gurram22 tuntia sitten
  • Is it just me or does your rocket ship look a little like Wallace & Gromit's?

    Douglas PowellDouglas Powell23 tuntia sitten
  • "Do you feel weightless?" ISS astronauts watching your video: "Yes..."

    Pu DuPu Du23 tuntia sitten
  • I am learning about the gravitational field in school and I love you.

    Pu DuPu DuPäivä sitten
  • Thank you for this... this is very informational and interesting !!

    akaByrd TwitterakaByrd TwitterPäivä sitten
  • Typically, a good rule of thumb when explaining difficult topics. If it can only be explained through metaphors, most likely, you got something wrong.

    Anthony RoccoAnthony RoccoPäivä sitten
  • This video attempts to discredit years of proven scientific research. It is no masterpiece, it is a blunder just as Einstein deemed it was in his day. This same mistake was made by Einstein and he later admitted how foolish it was, calling it one of his greatest blunders. You took a mans FAILED WORK called it fact and then USED HIS OWN WORDS to manipulate other people into believing it. I've never felt this way towards Veritasium but WOW. Please reconsider this opinion, research this topic further. We know gravitational forces exist, and we know they are directly linked with time which is why time travels more slowly as you are further from massive bodies like planets or dark matter. ALL PROVEN SCIENCE. This video directly opposes this in so many ways.

    Anthony RoccoAnthony RoccoPäivä sitten
  • if the force is based off acceleration/velocity, then shouldn't you way the same on the moon and on the earth since there acceleration is the same, or would the moon actually have more velocity so you should weigh more on the moon? so a planets mass size would be irrelevant when determining an objects weight, it would be the speed of the acceleration at that point in space?

    VirtualRunDownVirtualRunDownPäivä sitten
  • Can someone show me a jar of spacetime? It's all pseudoscience

    VeganGamesVeganGamesPäivä sitten
  • can someone explain how this applies to a neutron star

    Yonah AmosYonah AmosPäivä sitten
  • this makes me cringe so bad and question m existence

    Yonah AmosYonah AmosPäivä sitten
  • a straight line path in space-time that happens to be curved around a massive object. so any object regardless of mass and speed should fallow that same curve in space-time, because it thinks it is traveling in a straight line that happens to be curved around a massive object.

    Don JobinDon JobinPäivä sitten
  • What I understood: that video was sponsored by Caseta

    ParthParthPäivä sitten
  • Someone got a bigger budget

    Peter NguyenPeter NguyenPäivä sitten
  • I feel sad watching this right now knowing it's gonna have to end eventually, and that I can't watch this for the first time ever again

    bocoy noiubocoy noiuPäivä sitten
    • The reason Einstein and others like him are geniuses is because they imagine things the rest of us need help to imagine.

      bocoy noiubocoy noiuPäivä sitten
  • Toroidal fields. Earth is a 4.5 billion year old closed loop that self regulates co2 with LIFE. The climate cycles of our planet are continental glaciers with lower sea levels brought on by Global tsunami's. The changes in the tilt of the earths axis, north star and proximity to the SUN causes ClimateChange. Global warming The more the axis of the earth tilts towards the sun. The more DIRECT sunlight the higher latitudes poles receive. Warming the southern hemisphere heat sink oceans and thawing the northern hemisphere frozen co2 continents. Which is why temperature rises first and co2 follows. Cause and effect. Every 13 k years when the Precession of the north star aligns the equator with the solar orbital plane at the ecliptic's. The gravitational pull of the SUN pulls tsunami's around the planet East to west because the planet spins west to east. It happened before it will happen again. Not if but when. The one off with the slow rise of sea levels after the global tsunami's is the Zanclean flood of Noah in the Mediterranean.

    Gregory ByrneGregory ByrnePäivä sitten
  • .... did my dude really just copy this guy's videos?!?! fistart.info/tv/videot/04eb0HpoiMOlvsk.html

    Nathaniel MataNathaniel MataPäivä sitten
  • Not illusion

    Mix NewtonMix NewtonPäivä sitten
  • If gravity isn't a force, what is LIGO detecting? I'm sincerely not fishing for anything here, just genuinely attempting to understand this topic. I had watched this video a couple weeks back, and was just reading www.space.com/ligo-rounds-up-black-hole-mergers today. Found myself wondering how they're able to detect events so far away using gravity's effects with LIGO.

    ThroeflyThroeflyPäivä sitten
  • Me:- I want to a astronaut. NASA:- You must know all the theories and laws. Me:- 😑😑😑

    Navneet SinghNavneet SinghPäivä sitten
  • Given this explanation for gravity can you speculate on how to nullify gravity? So called anti gravity.

    Rob ParkerRob ParkerPäivä sitten
  • Biggest load of Croc ever

    Willie EvansWillie EvansPäivä sitten
  • 8:31 Hey! That's me!

    MeneGRMeneGRPäivä sitten
  • Excellent presentation, as usual. I always scoffed at the "earth coming up to meet you" concept, yet you have made it so simple and clear. HOWEVER - please help my resultant struggle. Here I am stepping off a North Pole tower and the earth is coming up quickly to greet me, yet, my Antarctic cousin has simultaneously done the same at the south pole. If not by expansion, then how can the earth simultaneously "greet" us both?

    Greg BehrendtGreg BehrendtPäivä sitten
    • Oops, never mind. I see you have already addressed this. (Though admittedly, I'm still working on conceiving it.) Again, great video, thank you.

      Greg BehrendtGreg BehrendtPäivä sitten
  • After watching this video The inner me: jump off the roof to find it out

    Šubhransu Sekhar sahooŠubhransu Sekhar sahooPäivä sitten
  • THEN EXPLAIN WHAT KEEPS US ON THE PLANET.

    REBEL OVERLANDREBEL OVERLANDPäivä sitten
  • @veritasium: So when u say space time is curved, does this apply to every thing at quantum level? The reason I asked this question is, do you think space-time has nothing to do with sub atomic forces? I always thought that gravity or as u say, space-time is just a result of sub-atomic forces on a massive scale. Everything u said is basically our conventions of defining things as it still doesn't explain anything in reality

    Ravi GodavarthiRavi GodavarthiPäivä sitten
  • The problem with this is it relies on the experience of the observer. Humans do not have senses sophisticated or precise enough to be accurate experimental tools of measurement. When you are falling you reach a terminal velocity because of the balance of forces acting on you. On average this takes about 10 to 12 seconds for humans of average size. If you are at a balance of forces you will FEEL not different than if there are no forces. But how you FEEL and what exists are not the same thing. So trying to prove gravity is not a force based on feeling while ignoring the overwhelming experimental data that says it is, seems a bit irrational to me. You can balance ANY fundamental force to create a 0 acceleration environment. You are using inertial refrence frames as a closed system to try to prove the existance or non existance of things outside of that refrence frame.

    Christopher BirkinbineChristopher BirkinbinePäivä sitten
  • But... the earth wasn't flat!? :p

    Tupac PalomequeTupac PalomequePäivä sitten
  • I think my brain just fell out! 😵

    LazavenLazavenPäivä sitten
  • How the hell has nobody done that experiment???

    Sidney PierceSidney PiercePäivä sitten
  • The reason Einstein and others like him are geniuses is because they imagine things the rest of us need help to imagine.

    Andrew HeagwoodAndrew HeagwoodPäivä sitten
  • this video is not for naive person like me..

    giant stepgiant stepPäivä sitten
  • hahahaha , whether you like it or not - GRAVITY IS A FORCE , , it's the nature,, the explanation is dumb

    von ilaovon ilaoPäivä sitten
  • Coincidently, the happiest thought in my life was imagining Einstein falling into a Black Hole...:) In that dream, Einstein would travel back in time, see the fork on the road and take it...:) The reason for the happiness is because Einstein was wrong to propose the geodesics paradigm and blocked the velocity-dependent force paradigm. The velocity-dependent Force paradigm was applied to the only force Mankind knew about in 1915. The only force was electromagnetism, a notorious velocity-dependent force. Well, it just happens GR and SR are wrong because the Universe doesn't care (doesn't follow) about Einstein's equations. Einstein's equations are equivalent to the tossing of a stone upwards. The evolution of the stone depends upon the initial velocity and the Gravitational Field, so it varies as the stone goes up or down. It just happens that the Universe is better described as a lightspeed expanding hyperspherical hypersurface. Here is the rebutal of GR, SR and L-CDM for good measure: ############################################ Challenge to Relativity - General Relativity is wrong! Marco Pereira's answer to How would anyone defend general relativity from Marco Pereira's HU challenge? (www.quora.com/How-would-anyone-defend-general-relativity-from-Marco-Pereiras-HU-challenge/answer/Marco-Pereira-1) ############################################ Status of DM Research - L-CDM is wrong! Marco Pereira's answer to What is the status (as of 2019) of the search for dark matter? (www.quora.com/What-is-the-status-as-of-2019-of-the-search-for-dark-matter/answer/Marco-Pereira-1) ############################################ Connecting Classical and Quantum Mechanics Marco Pereira's answer to Why did Albert Einstein have so much difficulty accepting Quantum Mechanics? (www.quora.com/Why-did-Albert-Einstein-have-so-much-difficulty-accepting-Quantum-Mechanics/answer/Marco-Pereira-1) ############################################ If curious, go here and see the map of the Observable Universe: qsnyc.shinyapps.io/UniverseMap/?_ga=2.240362826.896784838.1602297614-603560526.1600356343 and here you can see the location of Earth (a.k.a. Terra de Jassa): www.quora.com/According-to-the-Hypergeometrical-Universe-Theory-HU-where-is-our-universe-within-the-hyperspherical-hypersurface/answer/Marco-Pereira-1?ch=2&srid=3aDA This should give you an idea of how lacking is the current Physics when compared to my theory.

    Marco PereiraMarco PereiraPäivä sitten
  • What do you mean laser beam would be straight for external observer? If so, it would hit the center of a ruler, and then place photoelectric element just below cenetr. It lights or not? It can not be relative!

    Slavic RadkoSlavic RadkoPäivä sitten
  • Serious question: If (since) "gravity" is simply an illusion caused by curvature in space-time, how is it that we see reports of detecting gravity waves? If gravity IS as GR states, there shouldn't be any field, right?

    Jon SaboeJon SaboePäivä sitten