Why Gravity is NOT a Force

9 okt. 2020
3 458 218 Weergaven

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 CasΓ©ta 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 NLworld channel: ve42.co/gfl or his books: ve42.co/GFLbooks
Amazing VFX, compositing, and editing by Jonny Hyman
2D animations by IvΓ n 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

  • 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.

    VeritasiumVeritasium6 dagen geleden
    • Thank you for this wonderful video. I was searching NLworld since months and now you made me understand. Watched 2 times to understand and in future I will again come to this video.

      Aqdas Ahmad KhanAqdas Ahmad Khan10 uur geleden
    • I had to stare at it for a solid 2 hours before i got it

      Non SicuroNon Sicuro2 dagen geleden
    • @K.L. 🀯 amazing question! I think its because of the air/enclosed atmosphere on earth...and a free-falling person would interact with that "material" and it would feel that opposite friction from the air like a force against their skin & hair, etc... I've had to watch this video several times & surf thru some comments to get a lil bit of perspective. It’s a dizzying topic, but very interesting nonetheless!

      Adonai BlackwoodAdonai Blackwood2 dagen geleden
    • Then why on the opposite side of the Earth don't feel they are left behind and floating in space?

      Gol D RogerGol D Roger2 dagen geleden
    • Tell us. I know you think you understand what you thought I said, but what I said was not what I meant. 😞

      Jim LarsenJim Larsen2 dagen geleden
  • But doesn’t matter bend space time so doesn’t that mean that it’s a gravitational force!

    Matthew GeigerMatthew Geiger57 seconden geleden
  • Ok, no Gravity force. It's quite understandable. But the main question - Why does mass create this space-time curvature then? And Why do scientists searching for gravitons?

    mousesanyamousesanya2 minuten geleden
  • 5:04 Google is crying now. Are you happy πŸ˜‚

    Stefano StankovicStefano Stankovic3 minuten geleden
  • I'm absolutly not contesting the General Theory of Relativity, but I'm wondering two things: - Einstein started developing the theory based on the fact that when someone experiences a free fall, he doesn't feel any force. But considering that each atom of our body is attracted the same way by gravity, if it were a force, don't you think we could feel any force on our body anyway during a free fall? - One often talks about spaghettification of an object getting to close to a black hole. I would expect that if this is due to a distortion of spacetime, a spaghettified object would just appear that way the same way we can do an affine transformation, but would not feel anything. Whereas if it is a force, the difference between the extremities would destroy the object. Thanks in advance for those of you who can help me better understand these two cases.

    gpreuxgpreux6 minuten geleden
  • As the planet glides through space, it's flow - guided by every other curve accelerates.

    Pip GracePip Grace11 minuten geleden
  • I think it makes sense that an accelerating particle would give off electromagnetic radiation. It's like static electricity. Planets create a whooole lotta static energy careening through space! When are one of you knowledgeable types gonna do an Episode on Quartz Crystal?

    Pip GracePip Grace15 minuten geleden
  • If Gravity is not real, what force curves the spacetime around massive objects?

    TruvuzTruvuz28 minuten geleden
    • @Truvuz Gravity IS the curvature of space time

      Jesse NewtonJesse Newton8 minuten geleden
  • im only 14 but in wuld be cool to meat destin from smaterevryday and the action lab and vertaium in irl i love science

    Cole SweetenCole Sweeten35 minuten geleden
  • You lost me at that mathematical equation

    girish biradargirish biradar36 minuten geleden
  • Gravity is a lie , bouyancy a density are the physical laws that pertain to downward force , SPACE IS A LIE !!!!!!!!!! WHAT DOES FIRMAMENT MEAN , ENJOY YOUR LIES while there is still time . Space is fake all images are CGI

    troy stilestroy stiles43 minuten geleden
    • You’re cgi

      Jesse NewtonJesse Newton7 minuten geleden
  • Well there are no straight lines in nature, only curve-linear.. gravity would be non-point specific dielectric acceleration. It is not a force. Field theory looks at these problems, I'm still baffled as how people still think gravity is a force πŸ˜‚. General relativity gives "general" picture of the world.

    Thicc KrumpThicc Krump43 minuten geleden
  • so this is why fruits fall on ground, i mean the ground accelerates towards the fruits since the beginning of it, but when its ripe, its not as much attached to the tree, and once the tree let it go, Bam, the ground slams into the fruit...

    Yogesh TiwariYogesh Tiwari55 minuten geleden
  • well it's just a different way to think about it honestly

    SmearSmearUur geleden
  • I am thinking about electromagnetic radiations as gravity force: what if we discover that the electromagnetic radiations it is a misconception because it happens just relatively to our perception? Within the reality of relativeness, the perception of something is everything to what is meaningful.

    Gioacchino Alessio CapizziGioacchino Alessio CapizziUur geleden
  • This has just rekindled my interest in physics.

    QWERTY TangoQWERTY TangoUur geleden
  • Super interesting. I have a question. What causes spacetime to bend? The whole video I was having difficulty accepting the absence of gravity because my assumption was that gravity was bending spacetime.

    Preston StonePreston StoneUur geleden
  • Na espera da legenda em portuguΓͺs

    MatheuskbrMatheuskbrUur geleden
  • If gravity can be understood as a distortion of space-time, magnetic fields can be considered a distortion of something?

    ZywlZywlUur geleden
  • Legends say if you are watching veritasium during your online lectures you're gonna make difference. πŸ€™πŸ€­

    AKASH KAKASH KUur geleden
  • the graviton is the most essential element in the universe, The most fundamental of all elements in the universe is undeniable. The graviton is the only boson that can exist without any adjoining quarks and that alone through entanglement makes it the most important boson in the creation. the reason there is no light coming from a black hole is as the elements get closer to the enormous amount of entangled gravitons all quarks are ripped from their bosons, so photons no longer exist nothing exists yet the only boson that does not have adjoining quarks survive.

    musicm61musicm61Uur geleden
  • Great video! Just want to let you know that "Einstein" is actually pronounced differently (I am German...) in fact the "st" is pronounced like "shhht"

    NiklasNiklasUur geleden
  • STOP!! falling man cant experience weightlessness, how could he /she plumitting toward the ground . How much heavier could you feel.so i contest Albert and say no, falling from a building and floating in space are very differnt. gravity isnt a force, there is only really one force , lets call it God Force, or just the force. Gravity uses that force to work , same as electromagnetics or electrogravitics or both strong and weak nuclear .

    fox dosfox dosUur geleden
  • Gravity...so I still have to spend certain amount of energy just to counter this illusion..say like to stay in orbit. πŸ€”

    Eziman96Eziman96Uur geleden
  • Just at the moment, while the rocket accelerates (and /or changes the direction), the pilot WOULD recognise that, while bouncing or smashing to the hull. This phenomena is called inertia.

    john waynejohn wayneUur geleden
  • This is a hypothesis.

    RPKRPKUur geleden
  • Question: On the moving forward while standing still part. Is it the case that time moves forward, away from mass and that falling is just being left behind in TIME? So while standing on Earth, the Earth is pushing you through time at the speed you would be falling in it's gravity?

    Sean SanfordSean SanfordUur geleden
  • Phoebe be like: I KNEW IT!!!!

    Marcell KristΓ³f BΓ©kΓ©siMarcell KristΓ³f BΓ©kΓ©siUur geleden
  • Why is this video's view still stuck at 3.4M.

    Darshan PhyDarshan Phy2 uur geleden
  • Question: If I am in a spaceship in an orbit around the planet, that is only stable, because the ships thrusters keep accelerating it. Will I be pushed to the bottom of the ship (where the thrusters are)?

    Bilbo BagginsBilbo Baggins2 uur geleden
  • they use this for training astronauts in planes controlled descent for getting used to weightlessness.i guess we still don't know what causes gravity at one time it was considered to be the mass of the planet and control spin then it was theory it was the planet's core of iron which causes a magnetic field.now they saying gravity is caused by waves.

    Steven MorganSteven Morgan2 uur geleden

    Mo RafieeMo Rafiee2 uur geleden
  • There is always resistance even in space.

    mrsiecosiemrsiecosie2 uur geleden
  • My theory is that we if space is a vacuum and gravity is not a force time is constant. When we enter space from our planet we are moving. The universe is also moving. So what is actually still? If we were still. The universe would just fly by us.

    mrsiecosiemrsiecosie2 uur geleden
    • Everything is relative. Speed, acceleration, and time are all relative.

      Jesse NewtonJesse Newton5 minuten geleden
  • This video raises the question of why we still teach children about gravity 'pulling' objects towards it. The analogy of dropping a ball is often used to explain it. As a former teacher, it was hard to explain this as it wasn't logical. The immediate response from children is 'How is the Earth pulling the ball down?, which is a valid question. However, this explanation is logical; the ball isn't moving; everything around it is, including you - the observer.

    jarcherjarcher2 uur geleden
  • Surely no one should be re wiring their light switches by themselves? Awesome vid otherwise.

    el Bondel Bond2 uur geleden
  • What nonsense... every normal educated person can understand that the principle of equivalence is an illusion and that gravity IS a force... what do you feel carrying a 10 kilo load... a warped space... or a force pulling in your arms ? Veritasium... I thought of you as an intelligent person ! The so called "free fall" (hej, a FALL is always limited in time, but not an orbit around earth !)... further are you in an orbit in space moving 90 degrees to the gravitational fall lines, when you fall from the roof you move with the gravitational fall lines... You are spreading nonsense my friend ! A man falling from the roof IS accelerated... are you blind... or just a foolish BELIEVER ?!

    Berndt BarkholzBerndt Barkholz2 uur geleden
    • Gravity is not a force, it is a property of curved spacetime. When you fall off a roof you are following curved spacetime, not a gravitational field. Also, speed and acceleration do not exist if you have nothing to measure it against. It is all relative.

      Jesse NewtonJesse NewtonMinuut geleden
  • Yes it is true that Gravity is nit a force like the the electromagnatic force but the way you explained it was wrong!

    NerumanilNerumanil2 uur geleden
  • You could also just say the word force is an illusion. I think you are confusing annotations with the practicality of how we are. in this universe that is. If we look at the example of us standing on our feet. Whether we like it or not, we are exerting a force to keep us on our feet. This force can be also equated to the amount of energy we are burning in our body in order to stay put on our feet. This energy thus can be equated to the instantaneous force required to stay on our feet. now what is this force countering then? call it gravity or whatever. or call it force or whatever. Nothing is a force anyway, but rather phenomena of the universe, or the earth we live on, exert a force, one of these is gravity. Saying gravity is not a force is like saying a rocket is not a force. Ya well neither are forces. They exert forces.

    Abdul rahman El ChammaaAbdul rahman El Chammaa2 uur geleden
  • 13:14 why does an external observer (presumably stationary) see a straight line of light? The rocket would still be accelerating, so if the light lags behind after being fired, wouldn't an external observer also see a bent line of light?

    Patrick ChenPatrick Chen2 uur geleden
  • Cute ship. Did you consider mass producing them for sale?

    Space CadetSpace Cadet2 uur geleden
  • Then what holds the moon to orbit the earth without gravitatinal force? Same with the planets orbiting our sun. Are you trying to tell that Isaac Newton is incorrect?

    Randy OrtegaRandy Ortega3 uur geleden
  • So your frame of reference doesn't move but does everyone have the same sized frame of reference?

    Smackdab smackdabSmackdab smackdab3 uur geleden
  • So if there's no force of gravity, what compels a mass to go to the bottom of a spacetime warp?

    Edward IngramEdward Ingram3 uur geleden
  • e e e everything i have learned is a LIE

    Camque The Blue CatCamque The Blue Cat3 uur geleden
  • I see you've been channelling your inner Everyday Astronaut

    Anthony PaullAnthony Paull3 uur geleden
  • Gravity is not easy to explain, but you explained it so amazingly plus you have put so much effort into making this video is just commendable. Loved it. ❀

    Rajdeep PurkayasthaRajdeep Purkayastha3 uur geleden
  • All my house is ContrΓ΄l by Lutron smart switch, it’s working very well. You can do IFTTT with them , that’s very clever.

    Luc GauthierLuc Gauthier3 uur geleden
  • I think you distroyed the dimensions concept as well... πŸŽ‰πŸŽ‰πŸŽ‰

    Sourabh singhSourabh singh3 uur geleden
  • 11:37 why I didn't ask this question to my physics teacher

    KshitijKshitij3 uur geleden
  • excellent

    TrumanHWTrumanHW3 uur geleden
  • Watched for the first time, 99 to go

    3 Pizzas to go3 Pizzas to go3 uur geleden
  • Space and time 2 concepts πŸ™Œ πŸ˜‚πŸ€£πŸ˜‚πŸ€£ even einstein new he was referring to a concept... what deluded sheep. πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ¦„πŸ¦„πŸ¦„πŸ¦„πŸ¦„πŸ¦„πŸ¦„πŸ¦„πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘πŸ‘

  • Great video, one question, what is causing us to be constantly accelerating?

    AndrewAndrew4 uur geleden
  • Throwing your helmet like that will render it unusable

    ruffexruffex4 uur geleden
  • so basically non sentient matter have perception and are aware of their surroundings? or is matter actively responding to an effect of their surrounding because of a change within their own field/dimension?

    Marlon CornejoMarlon Cornejo4 uur geleden
  • @Veritasium Okay, okay, okay. I will consider gravity is no more, it is all acceleration, so: a)What about magnetism, is that an illusion, too? b) Also, all objects spinning are throwing things off them, not into them, so why aren't we being elongated and thrown off Earth? c) Earth spins at 1670km/h = 0.4638km/s, meaning if I jump for 1 second, I should stay still, while Earth will move beneath me for 0.4638 km. Why doesn't it happen?

    A.C. J.A.C. J.4 uur geleden
    • a) kind of. Magnetism is a relativistic effect of electricity nlworld.info/key/video/kox8hcukoo6IhGc b) earth's spin has a minuscule effect at the equator, you are very slightly lighter at the equator than at the poles. The spin is not what causes the acceleration, the electromagnetic interaction between the atoms in the ground and your feet is. c) for the same reason you don't get left behind when you jump in a moving bus. You are already moving the same way as earth's rotation and that momentum is conserved.

      Narf WhalsNarf Whals3 uur geleden
  • Hi Veritasium. Your explanation is simple and precise. I would like to suggest you to add gravitational waves with your explanation . Thank you

    Manoj KumarManoj Kumar4 uur geleden
  • hey thats the explanation flat earthers used to show how gravity would work on a flat earth. guys veritasium is a flat earther

    GD lifestealGD lifesteal4 uur geleden
  • What about the tidal forces?

    MDMD4 uur geleden
  • If the floor is accelerating upwards, why doesn't the floor fly up?

    ChompChompNomNomChompChompNomNom4 uur geleden
  • Mind blown, are they really twins? :)

    MVP_KZMVP_KZ5 uur geleden
  • Trust me it went over my head despite how well this guy is explaining.

    hero herohero hero5 uur geleden
  • Amazing.Subbed.

    Oscar DzikiOscar Dziki5 uur geleden
  • Would this theory be invalidated if you were in space moving at a constant velocity and sucked into a black hole, you would still be a body travelling at a constant velocity, until you go in (assuming feet first) then your feet accelerate at a different rate to your head as you pass the even horizon?

    Jack O'TooleJack O'Toole5 uur geleden
    • @Jack O'Toole Your feet and your head are still both inertial frames, just not the same one. They try to follow different geodesics because the curvature around a small black hole is very different across small patches. That is what causes tidal forces.

      Narf WhalsNarf Whals3 uur geleden
    • What I meant to say is surely you can prove gravity is a force: as you approach a large body of mass you accelerate towards it. Your frame of reverence is inertial right up until you hit it. Whereas if the body of mass was a black hole your frame of reference would no longer be inertial as your feet would accelerate at a differing rate to your head (assuming you went in feet first). If anyone could clarify that I’d be much appreciative πŸ‘

      Jack O'TooleJack O'Toole5 uur geleden
  • Ocean is not a force either. .

    Chakravarthy CChakravarthy C5 uur geleden
  • bwain feel big got

    Narayan lfaleeNarayan lfalee5 uur geleden
  • "Are you watching this in an inertia frame reference?" _Jumps on my bed_ Yes.

    Chris DChris D5 uur geleden
  • at some point the guy will have touched the inside of the space capsule as it changed course. just a brush of a sleeve on the interior to keep him centered in the capsule is displacement; force vector

    michael burkhardtmichael burkhardt5 uur geleden
    • He doesn't need to be centered because he is accelerating at the exact same rate as the rest of the rocket. Nothing inside the rocket tells him there even is a planet.

      Narf WhalsNarf Whals3 uur geleden
  • you are pretty cute mate :*

    Quang TuanQuang Tuan5 uur geleden
  • Check this video. A more elaborated version of this video. nlworld.info/key/video/2Kqoma7NeYyKjJo

    Biruk EphremBiruk Ephrem5 uur geleden
  • It makes sense, also I'm very curious on perspective. A different Perspective can change the whole world view. I question most of what I study and some of what I study instinctively feels wrong to me and I feel stupid to ask my teacher of everything because the replys to my questions are mostly questioning my view point rather than trying to explain it. (I feel stupid for trying)

    Uncanny voidUncanny void6 uur geleden
  • physicsonly.com/schrodingers-cat-an-absurd-thought-experiment/

    Som AbhisekSom Abhisek6 uur geleden
  • You Explained it very Well... This video is a master piece for School & college students to understand the Gravity...!

    yousaf sohailyousaf sohail6 uur geleden
  • But wait - why do astronauts onboard the ISS feel weightless when in fact they are in a constant free fall?

    GKEGKE6 uur geleden
    • Because you are weightless in free fall. That is the happy thought.

      Narf WhalsNarf Whals3 uur geleden
  • "So i had a rocket ship built" and its the coolest rocket ship to go with the best explanation i love Veritasium its like Art

    blueblue6 uur geleden
  • So fantastically written,executed and explained....MASTERPIECE OF NLworld.

    AsifZaheerAsifZaheer6 uur geleden
  • If there is no gravity then what is pulling local groups of Laniakea Supercluster or what is the Great Attractor or Shapley Supercluster. Isn't Gravity the only explanatory force to understand the observable Universe?

    mwpuneetgmwpuneetg6 uur geleden
  • Is the universe constantly falling forever?

    Uncanny voidUncanny void6 uur geleden
  • Veritasium: gravity fields don't exist. Black Holes: B R U H

    hen kohen ko6 uur geleden
    • Umm... you mean I'm flying at 9.8m/s^2. A new view for gravity if there's is one. thank you for the thought. and good video it help me

      hen kohen ko6 uur geleden
  • 12:31 how does it feel to be kicked in the face at zero G?

    Marcelo MeirelesMarcelo Meireles6 uur geleden
  • I have a question but I'm not sure how well I'm going to convey what I mean but I'll try my best. Let's assume, just for the purpose of this question, the Earth isn't rotating but it's still travelling around the sun. Now imagine the East and West poles. The Earth still travels around the Sun so the Eastern pole would reach it's twelve 12 o'clock position, as it travels around the sun, before Western pole, because the Western pole would always be behind the Eastern pole. If two people, stood at each of these poles were to drop ball, would general relativity mean the ball dropped at the Eastern pole would hit the surface of the Earth before the ball dropped at the Western pole? I hope that makes sense because I'm just trying to gauge whether I've understood what general relativity is or not.

    Healer ToneHealer Tone6 uur geleden
  • β€’Then why do a free falling ball bounce after hit the ground? ⁉️. β€’It is not possible when we free fall a ball in a accelerating rocket! (Relative to rocket) β€’ So is the relativity is breaking in this case? β€’PLEASE EXPLAIN ‼️‼️‼️⁉️⁉️

    Rakesh shankarRakesh shankar7 uur geleden
  • Why do you have to use so much time to explain this simple idea? You are over-eplaining (man-splaining) it and scaring people away from understanding.

    viktor hansenviktor hansen7 uur geleden
  • Surely if 2 people were to head in a northerly direction (following a compass) they will converge at the same point because they are headed for the same point. Its the same as 2 people heading to China, they will converge at the same point also. But if 2 people were to head east (following a compass) they will not converge at the the same point because there is no definitive point to the east (or west for that matter)

    the jonesthe jones7 uur geleden
  • No such thing as gravity,, there is only bouyancy and density.

    Wetpaint WilliamsWetpaint Williams7 uur geleden
  • Very cheap rocket no seat or seat belt..

    John O BrienJohn O Brien7 uur geleden
  • Nah.. gravity IS a force. Einstein was wrong.

    Jason KingJason King7 uur geleden
  • basically there is no gravity, the earth just sucks

    jim kurkjim kurk7 uur geleden
  • Here's what I think. If gravity is the illusion that you're talking about, then mass is creating space that is travelling away from it, and therefore we are then being accelerated because there's more space generated closer to the source of mass than there is further away. essentially, the further away you get from mass, the thinner the space that the object created gets. This could be the explanation for dark energy. I have no mathematics to prove this though.

    Dwight Keller-WilliamsDwight Keller-Williams7 uur geleden
    • The reason why our vector is pointed down towards the center of earth is because space is radiating outwards from the center of the earth.

      Dwight Keller-WilliamsDwight Keller-Williams7 uur geleden
  • Gravity was a conspiracy by illuminati.

    Mass* AccelarationMass* Accelaration7 uur geleden
  • That was a Super Mario Bros. 2 rocket.

    Real BeginningReal Beginning7 uur geleden
  • You got me worried about Australians man.

    θŠ±γ εΈγ„ζ•£γ‚θŠ±γ εΈγ„ζ•£γ‚8 uur geleden
  • Science tells us that the universe is flat, so how can there be curved spacetime? Another thing is that you say "it curves the opposite direction on the other side of the earth"... that doesn't make sense because if that's true and we look at the stars then the sky must look different than if you'd stand on the other side of the earth and that would mean that everything must spin the other way around. Also if the universe is flat, then there's only one way to go up so if the whole earth is going up then we must see a difference when we look at the stars when we are on the north pole or the south pole and we don't see that, it's all the same which doesn't make sense.

    Ricardo PendersRicardo Penders8 uur geleden
  • I am confused. If it's not a force, why are physicists trying to unify it with the other three fundamental forces?

    Oliver LeeOliver Lee8 uur geleden
  • Well, who said it IS force?

    glasseffectglasseffect8 uur geleden
  • Umm... you mean I'm flying at 9.8m/s^2. A new view for gravity if there's is one. thank you for the thought. and good video it help me

    Cedric John FloresCedric John Flores8 uur geleden
  • If your driving down the road in a car, does that mean you are moving sideways in time?

    GT 43GT 438 uur geleden
  • Your explanation for gravity was a hypothesis given by Einstien. It was never proved. Even many scientists today refuse to accept this hypothesis.

    Pranjal PathakPranjal Pathak8 uur geleden
  • Derek looks like he could be the brother of Dichen Lachman...

    Erik OksenholtErik Oksenholt8 uur geleden