Why Gravity is NOT a Force

  • Am Vor Monat

    VeritasiumVeritasium

    Dauer: 17:33

    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 DE-film 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
    de-film.com/ch-UCILl8ozWuxnFYXIe2svjHhg

Veritasium
Veritasium

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.

Vor Monat
Quinn Haze
Quinn Haze

@Des Troya math is reality. It’s all 1s and 0s

Vor 19 Stunden
Mike80528
Mike80528

@Quantum Tech You are inducing energy into two objects at rest. With this new frame of reference, mass has to be a force. That solves the problem as mass acts on space-time to induce motion in that case. Space curvature isn't really 3-dimensional, it's just illustrated that way to make visualization easier.

Vor 23 Stunden
Quantum Tech
Quantum Tech

Because space time is 4Dimensional And curve is 3 dimensional if we exclude time so that's why the objects or astroids above earth will also get attracted. And their is no downward to Space time

Vor 23 Stunden
Mike80528
Mike80528

Isn't this a circular definition problem due to the definition of force? Gravity provides the relative reference for force. But in an absolute sense, if you had two objects of a given mass in completely empty and flat space with no motion - they are completely at-rest. No kinetic energy. Exerting an external force would generate momentum. The gravitational distortion caused by their mases will also cause very slow but real acceleration towards each other. The net effect is the same unless there is an argument that the warpage of space gives-up energy to the objects to make them move, which creates serious issues...

Vor 2 Tage
Trist Drew
Trist Drew

@Flare 72 because the moon curves space time too? I thought the tides caused friction (force) to the orbit anyway which over many years is what is reducing the angular momentum thingymcjiggy and hence means the moon gets further away?

Vor 9 Tage
anywhere from
anywhere from

too abstract, not fully understand yet

Vor 20 Minuten
Rose Fahmida
Rose Fahmida

This video is a masterpiece. The best explanation of gravity on the internet currently.

Vor Stunde
Berserk Berserk
Berserk Berserk

7:55 Veritasum calling you FAT !!!

Vor 6 Stunden
Shawn chew
Shawn chew

Am i not getting this? But why would i feel like he is proving flat earther right

Vor 15 Stunden
haha huhu
haha huhu

I'm not really buying the star path being deflected at a point since the light goes everywhere equally, the observed star should be observable of the other side of the sun or making a halo around the sun

Vor 16 Stunden
Narf Whals
Narf Whals

That happens https://en.wikipedia.org/wiki/Einstein_ring But you need to be at the right angle to see it.

Vor 15 Stunden
Its All Good Games
Its All Good Games

kim jung un approves

Vor 21 Stunde
Gary Dumpleton
Gary Dumpleton

The blaring omissions in Einstein's equivance is space. Which we know is not empty. See vacuum energy. .positron electron generation. And many others. So in gravity space is moving. How fast is it moving. G x t. Where t is life of the earth. 4.2 billion years. That's fast. So if positron and electrons are generated from space why don't they have the momentum from space. If space is not moving why don't the particles collide with our momentum. Maybe the casimir effect holds the answer. The space that is around us and between atoms is contained by the matter surrounding it. Kind Regards Gary

Vor 22 Stunden
Lucas Anonymous
Lucas Anonymous

Gravity *applies* a force. Not a force itself. There is a big difference.

Vor Tag
un named
un named

air resistance cries in the background

Vor Tag
Narf Whals
Narf Whals

Always inconvenient. Always ignored... We feel you, air resistance. We feel you!

Vor 14 Stunden
Sven van Veen
Sven van Veen

I understand the part that when I'm falling I am actually in a intertial frame of reference and everything moves up so it looks like I'm falling. The thing I don't understand is how can the earth be accelerating up in every angle. Or does it mean that we are accelerating at the exact same speed as the value of curved space time so that means our spatial coordinates are not changing therefore we are staying at the same position on earth. But then again I am not fully understanding how the earth is pushing me up in every angle. I would appreciate if someone could explain this to me.

Vor Tag
Sven van Veen
Sven van Veen

@Narf Whals thanks for the reply! I will take a look at the pinned comment!

Vor 13 Stunden
Narf Whals
Narf Whals

Basically correct. In curved spacetime you have to accelerate to stand still in space. The earth accelerates "outward" while standing still. Falling objects don't accelerate so they move in space. The earth just gets in the way. He talks about this in the pinned comment.

Vor 14 Stunden
Władca Wymiaru
Władca Wymiaru

Gravity is a water, and we are it it, like a fish that do not realize the water exist. And WHY the pancace becomes flat when spinned? It because water and other things insice have VISCOSITY!!! This is why all work, galaxies, solar systems, planets...and this field believe me has HUGE power! Farther you are, then stronger is that field...

Vor Tag
s r
s r

Ahh,Derek! Does that mean that all middle and high school physics teachers should be changing their curricula?

Vor Tag
Jay BK
Jay BK

how many times do I have to watch this? It's so unbelievable.

Vor Tag
Eben Tee Entertainment
Eben Tee Entertainment

Brief explanation 👌🙏

Vor Tag
Dhruvin Vekariya
Dhruvin Vekariya

Solution to charge problem: Make law that static charge emit em radiation and accelerating charge does not 🙃🙃🤔🤔

Vor Tag
Johnathon Tully
Johnathon Tully

Hi Derrick, can you please do a video on “loss of simultaneity” and how it suggests our future is actually set in stone? I don’t fully understand it but I think it relates to time dilation and different observers observing an event from their own unique reference frame where each observe the event at a slightly different moment in time. For that to be possible, the future must have a fixed eventuality otherwise the observers would/could observe different outcomes. Is this correct? It seems like a fairly powerful argument to suggest our future is fixed

Vor Tag
Narf Whals
Narf Whals

It isn't entirely correct. The relativity of simultaneity preserves causality. While observers may agree on the order of some events they all agree on which event caused which. Some of PBS spacetime's recent videos deal with this exactly issue and its effect on free will. https://www.youtube.com/c/pbsspacetime/videos

Vor Tag
godSave waldo
godSave waldo

But shouldn this be same for all planets? Why is there no. Gravity in Venus or Mars or Moon...?? Dude wtf

Vor Tag
Narf Whals
Narf Whals

What do you mean? There is gravity on all planets and moons.

Vor Tag
Erwin Pietersen
Erwin Pietersen

then why are we shorter in the evening than we are in the morning? is that not gravitational force? i'm a lay so please explain in a way i'd understand

Vor Tag
Narf Whals
Narf Whals

Because the ground pushes our feet into our bodies.

Vor Tag
Raiyan Rahman
Raiyan Rahman

you just changed how I used to view the world. Now take responsibility for that.

Vor Tag
Rachel Milt
Rachel Milt

oh that’s so cool

Vor Tag
Vorname Nachname
Vorname Nachname

i as a German felt sad when I realized, that you adopted the word "schadenfreude". this tells a lot.

Vor 2 Tage
oogly boogly
oogly boogly

Do you feel weightless? No. Guy watching veritasium on the ISS: DO I NOT EXIST

Vor 2 Tage
deepstrasz
deepstrasz

Maya, maya everywhere.

Vor 2 Tage
Revel Carlberg West
Revel Carlberg West

4:39 I hear a Minecraft villager say something.

Vor 2 Tage
Anthony Christ
Anthony Christ

Now. You have mentioned a man falling out of the sky but what about a body submerged underwater? If we didn’t need oxygene could practically “defy gravity” permanently? Just another example how gravity does not exist In the ways society teaches D:

Vor 2 Tage
Harsh Mishra
Harsh Mishra

Derek, I Enjoy your videos ! I have observed many a times whenever There is a plot of any random event then it seems to follow the normal distribution be it:- 1. Maxwell-Boltzmann Distribution in GASES or 2. Nationwide Trend of Marks obtained by students in any University entrance exam or 3.Rates of reaction vs Temperature . How does it relate ? How does normal distribution relate to randomness of nature ?

Vor 2 Tage
Glen Jennett
Glen Jennett

I see gravity in a different way that would take too long to explain here, but I agree that gravity is not a force. I think I understand what gravity is and how it works.

Vor 2 Tage
Sharon Stanphill
Sharon Stanphill

I have questions. I lived and worked on a large cruise ship. When I got off I noticed while standing in line to pay a guy ahead of me was rocking back and forth very slowly. Guested he worked on the ship to and discovered I to was slow rocking. So I have the motion of the wobbling whole earth spinning, the solar system moving, universe expanding, and wave action rocking my ship. Does that change things and how? My body changed to keep me balanced. I couldn't feel the changes when off the ship.

Vor 2 Tage
Christopher Turner
Christopher Turner

Yah Terrence Howard already did this lol 😂

Vor 3 Tage
Chelsye LittleWing
Chelsye LittleWing

So can quantum loop gravity still possibly work as a contender up there with string theory in how quantum mechanics could possibly unite with TGR one day ?

Vor 3 Tage
Kevin Wells
Kevin Wells

Could the same thing not be said about the other forces (EM, strong, and weak)? It would be easy enough to explain magnets pulling together as a warping of space rather than as a real force right? If not then what is the difference between them?

Vor 3 Tage
UnknownCleric2420
UnknownCleric2420

"What made Einstein so happy about this wasn't Schadenfreude." Every Scunt ever: "B A H A H A"

Vor 3 Tage
Tim S.
Tim S.

Ok, I can accept this. Now my understanding of time is broken.

Vor 3 Tage
Robin Clark
Robin Clark

Ye, me too. like what's the point ppl still learn all kinds of force.

Vor Tag
sudhindra nath
sudhindra nath

no, I don't think free falling charge will radiate. I think the charge will only radiate when actual force like magnetic or electric force will apply on it. Yes, now I really think gravity is not a force.

Vor 3 Tage
Narf Whals
Narf Whals

Then it should radiate when sitting on the table. The table applies a real force to it. The answer is that whether you see the charge radiate also depends on your own reference frame. If you are freely falling with it you don't. If you are sitting in the lab with it, you don't. But it you see it fall you do. And if you fall while you see it sit you do. Google paradox of an electric charge in a gravitational field.

Vor 3 Tage
Animesh
Animesh

If light is slightly bending downwards coz of acceleration then we can measure the one way path of light to calculate the speed of light coz if we let the light to bend then the light will cover a circular path and hits the point from where it has been emited!!!!!!

Vor 3 Tage
Elemental Golem
Elemental Golem

One quick question. When it ties to thw tides and the moons effect on water how would it look when using this way of explaining gravity? Would it be that the moon further curves space time on top of earths curvature of space time?

Vor 3 Tage
Narf Whals
Narf Whals

Everything with mass/energy curves spacetime. Tidal forces happen when one part of an object has a different geodesic than another. That is what the moon causes on earth(and vice versa). Spacetime is curved more on the side that is nearer to the moon so.

Vor 3 Tage
Akos Nadas
Akos Nadas

The other night a question popped into my head regarding this video. I did watch it a while go so excuse me if i remember things wrong. I do recall saying that you couldn't tell the difference between earth's gravity and accelerating on a spaceship with 1G in outer space. This seems legit so far, then it hit me. A water droplet on earth would fall in it's teardrop shape towards the ground, however i suspect that on a spaceship accelerating with 1G it would be the shape it usually is in space, bubble like. In conclusion you could tell the difference i think. What do you think?

Vor 3 Tage
Akos Nadas
Akos Nadas

@Narf Whals yup, seems legit. The more i look into it, the more sense it makes.

Vor 2 Tage
Narf Whals
Narf Whals

@UCVxhBLtia7sQBXC9IbRdMSA that shape is actually very aerodynamic. People tried to build cars that way, they're just ugly. Look up air flow models for it. But again, because raindrops are very soft they don't actually have that shape. They get squished in the middle and bulge at the sides. Their shape does not come from gravity. You can see this from videos of scientists on the space station letting water float around. It is falling freely and gravity is not significantly weaker there. It tries to collect onto a sphere. The difference is that the air is not rushing past it.

Vor 3 Tage
Narf Whals
Narf Whals

A raindrops shape comes from air resistance(it also isn't actually a teardrop shape more like a smooshed bean). If there is air in the rocket it will have the same effect there as it has on earth because it is being pushed past the water droplet by the rocket.

Vor 3 Tage
Daniel Palanker
Daniel Palanker

If gravity is not a force, what attracts two static masses to each other?

Vor 3 Tage
Daniel Palanker
Daniel Palanker

@Narf Whals Thanks for the link! Here is even better illustration, in my view: https://youtu.be/wrwgIjBUYVc

Vor 3 Tage
Narf Whals
Narf Whals

@Daniel Palanker There are no static objects in spacetime. Everything always has a velocity. If it doesn't have a velocity in space it is moving in time. Two balls that are not moving relative to each other in space are moving at the same speed through time. Which basically means their clocks tick at the same rate. And it is not actually space curvature that is responsible for gravitational attraction as we know it, but time curvature. https://www.youtube.com/watch?v=F5PfjsPdBzg

Vor 3 Tage
Daniel Palanker
Daniel Palanker

@Narf Whals I’m asking about static objects (e.g. touching balls). Their relative positions do not change in space and time, even though the space is curved.

Vor 3 Tage
Narf Whals
Narf Whals

Spacetime curvature. Their geodesics are curved towards each other. They don't need to be moving relative to each other for that. They are on parallel paths through spacetime. If they are not moving in space then they are moving through time that much faster. Those parallel paths curve towards each other. Imagine the surface of the sphere again but the direction towards the pole is time.

Vor 3 Tage
TheLethalOne
TheLethalOne

yo meh brain

Vor 4 Tage
Luca Mancinelli Degli Esposti
Luca Mancinelli Degli Esposti

When we look from the outside at a laser beam crossing the rocket shouldn't we see it hit the opposite wall at a lower level due to the fact that the rocket is accelerating towards the beam?

Vor 4 Tage
Narf Whals
Narf Whals

Yes. But the path it travels will be a straight line.

Vor 4 Tage
Bolt D. Etherion
Bolt D. Etherion

So the people beneath.. Ahm.. Don't they fall of then?

Vor 4 Tage
69keniu
69keniu

So Newton wasn't right?

Vor 4 Tage
Narf Whals
Narf Whals

Not about gravity. But he was right enough for everything people may come across in everyday life. His formula is much simpler than General Relativity and good enough to get you to the moon. That is why it is still taught in school.

Vor 4 Tage
Nechar Joshi
Nechar Joshi

I was having a hard time understanding some of the concept. But became more apparent after I watched this. https://youtu.be/jhpKUapI3cY

Vor 4 Tage
ramansh paliwal
ramansh paliwal

Acelliration is same as gravity or acceleration is same as gravity. Se the elevator clip of the movie the genius/Albert Einstein great movie. Great vidio,thanks and appreciate the great cgi

Vor 4 Tage
Butchness
Butchness

no? it's an acceleration?

Vor 4 Tage
Archie Doughman
Archie Doughman

GRAVITY is a subjective matter especially relative to the earth surface and its rotational movement base on its axis... now, how about magnetic field that we have on earth..what do the earth magnetic field does?..If the earth is rotating and there is no gravity why the object on the earth surface is not being thrown outward due to centrifugal force of the earth rotation...what force that holds the object on earth's surface..?

Vor 4 Tage
Narf Whals
Narf Whals

The rotation of earth is basically negligible. It makes you weigh about 0.3% less at the equator than at the poles. The video explains why we feel drawn towards the surface. That's just where our natural motion takes us.

Vor 4 Tage
Commander ZiN
Commander ZiN

I actually learnt something new and yet it's been around for years. Makes perfect sense just never thought of it that way before.

Vor 4 Tage
Time Factor Theory of Gravity and Relativity.
Time Factor Theory of Gravity and Relativity.

There is even more to Time! Added a challenge with a prize to Time Factor Theory!

Vor 4 Tage
1s4
1s4

I DIDNT ASK AY OF THESE QUESTIONS BUT IM GETTING ALL THE ANSWERS

Vor 4 Tage
Foxste Gamer
Foxste Gamer

I think this was the video which made me think how we are in a simulation probably

Vor 4 Tage
Harsh Mudgil
Harsh Mudgil

Help me with this one. Are you basically saying that, instead of us being accelerated towards the Earth, we experience an acceleration away from the Earth due to the fact that we are moving with the Earth on a straight line path on a curved space around the sun. Is that right or am I missing something?

Vor 4 Tage
Narf Whals
Narf Whals

@Harsh Mudgil Yes. That force is the electromagnetic force between the atoms in the ground and our feet. That is what is keeping us stationary relative to the ground. Without it we would be freely falling with no forces on us.

Vor 4 Tage
Harsh Mudgil
Harsh Mudgil

@Narf Whals he says in his pinned comment that, on a curved space time you have to accelerate to be stationary. Before he mentioned in the video that Gravity isn't a force. But if indeed, in a curved space, we have to accelerate to be stationary then it means to be stationary there has to be a force acting on us.

Vor 4 Tage
Narf Whals
Narf Whals

No. When standing still on the earth surface we are experiencing an acceleration "upward" due to the atoms in the ground pushing against the atoms in our feet. This has nothing to do with the earth's motion around the sun or its rotation. He explains in the pinned comment what it means to accelerate while standing still.

Vor 4 Tage
Oscar Rotili
Oscar Rotili

what is that general relativity formula at 10:15 called?

Vor 5 Tage
Narf Whals
Narf Whals

The Geodesic Equation https://en.wikipedia.org/wiki/Geodesics_in_general_relativity

Vor 4 Tage
Tommy the Cat
Tommy the Cat

the first time I held my girlfriend's hand and kissed her I felt weightless, does that mean I was an inertial observer?

Vor 5 Tage
Ian williams
Ian williams

G'Day,,,Hmmmmmm,,, why does space time bend around a object,??So what you are saying is that space time cannot go through solid objects and need to go round it ,thus appearing to bend time around object, Finally if Gravity didn't exist then why do we fall,??and if acceleration is to blame how come the earth isn't doing a couple of millions miles an hour and increase speed in time,,years would be shorter and days near vanish,,But none of this has occurred,, as for your proton dropping giving off charge,,simple static electricity generated by friction as it move's,as we all know atoms are made up neutron and electrons,,and each atom can only hold so many electrons,as the atom moves it capture more free electrons,, cannot hold this extra charge and then releases charge to atmosphere,,so discharging effect show Giving of energy,,+ One More to think about,,as the atom falls it collides with other atoms,thus gathering extra charge, Now assuming we can indeed see the smallest partical,,,????Does the charged partical,deviate in the fall,,?? Don't give me vacuum stuff as we are not in a vacuum,,The space ship,is,and we all know about inertia,,body at rest tends to stay at rest unless acted on by another force,,in this case acceleration,, were as here on the planet..we seem to be sucked to the ground,,Gravity,?? Why does any thing with mass attract others mass,, Could it be,magnetic waves we cannot see,, might explain why time bends,,but not light,,try to bend light with a magnet,,Yer nup,,doesn't deviate, same as your laser pointer experiment,,Gravity has no effect on light,,and acceleration would not either,,If what you are saying is correct,,

Vor 5 Tage
hothaifa tayeh
hothaifa tayeh

I have a question i hope it'd reach you, What is the source that makes planets and galaxies move if gravity is an illusion, also is the whole universe static or moving, does it have any relation to the fact the universe is expanding, and what is the reference position in the universe to express the relative position for any object in the universe, as in the example of the accelerating rocket-ship the floor of it was the reference for the objects inside it, and is that reference if it exists moving? sorry for the long questions but i have so many questions but the ideas that you shared in the video are fascinating leaving me helpless but to start wondering about

Vor 5 Tage
Narf Whals
Narf Whals

Movement is always relative. Everything in the universe is moving relative to something else. When you ask "is the whole universe moving" you must ask "relative to what could it be moving?" There is no absolute reference frame to give absolute movement or absolute position. A useful reference frame is the one that is moving along with the expanding motion of the galaxies https://en.wikipedia.org/wiki/Comoving_and_proper_distances#Comoving_coordinates In a gravitational field of a planet a useful frame is the surface of the planet or a freely falling one. The surface of the planet is similar to the inside of the accelerating rocket with its thrusters turned on. While freely falling would be the rocket falling towards the planet.

Vor 5 Tage
Soutpeel
Soutpeel

Wrong. https://youtu.be/vHU1jVvs5UA

Vor 5 Tage
Nesto
Nesto

My physics teacher disagrees

Vor 5 Tage
Paul Turner
Paul Turner

They say Gravity is a bitch.

Vor 5 Tage
You Forever
You Forever

This is all B.S. A time-waster!

Vor 5 Tage
Dyida
Dyida

Amazing. You can regurgitate from religious books.

Vor 5 Tage
Vaibhav B shet
Vaibhav B shet

What about flat earth society

Vor 5 Tage
Rudisbashar
Rudisbashar

Blackhole:...just another brainfart....

Vor 5 Tage
Dhairye Shekhawat
Dhairye Shekhawat

Can we say that gravity is the bending of spacetime or why cant we say it

Vor 5 Tage
Bopsop
Bopsop

13:58 I need a bit of explanation here. So light is bent when measured relative to an accelerating frame of reference? I thought this whole time that light was bent because of lights traveling through a straight line, through curved spacetime created by the object. What did I miss here?

Vor 5 Tage
Narf Whals
Narf Whals

The reasoning is that those scenarios should be the same. Standing still in the curved spacetime near a massive object should be the same as accelerating "up" with the same g. Light bends in both scenarios. In the acceleration scenario it happens because the observer is accelerating away from the light. Around the massive object it happens because of spacetime curvature.

Vor 5 Tage
Sam Mullins
Sam Mullins

Curved space-time is non-sense same as religion. Religion says I need religion instead of saying, I could progress within equals' togetherness for building God's FAITH within both of us, both individually plus OUR religion! Otherwise it is Satan's anti-Servant republicly mis-used Occult. Definitively Speaking, it is my turn to pray for me:: Communism/Socialism like USA is when authoritarians count ONLY upon centralized (mainstream) decider's voice (opinion), whilst silencing everyone else's. Corruption addicts' senses like Republicans, Democrats, & Libertarians are as stupefied as that Helen Keller astronaut, whom are isolated thereby "their" impoverished exosphere. Predicamented Sin-Slavery has factoried REPUBLIC astronaut-ed NON-sensed to extent, they actually misbelieve propaganda Human Society is bouncing off the ceiling. They welcome the next discovery thinking nothing can escape their senseless damnings(if presented hidden within politically correct superficials). Anyone not desensitized will tell you planet-size gravity compounded by nearest star horizontally dived/impacted that spaceship into casualty.

Vor 5 Tage
UnkieRich
UnkieRich

Isn't this the same theory the flat Earthers have? They claim there is no gravity and the Earth is accelerating up at 9.8 meters per second squared. You have chosen poorly!

Vor 5 Tage
Narf Whals
Narf Whals

Flat earthers chose a little truth to misrepresent and build a lie around. That is common practice among liars.

Vor 5 Tage
United Digital Solutions
United Digital Solutions

Before Rocket Veritasium crash lands on the moon, wouldn’t Rocketman feel the rocket accelerating into the moon? You made it seem otherwise.

Vor 5 Tage
Narf Whals
Narf Whals

Not from inside the rocket. He can look outside and see that the moon is coming closer, but inside the rocket there is nothing that indicates an acceleration.

Vor 5 Tage
cardayz
cardayz

What about electrostatics? Is that a force? Mathematically it is identical to gravity. Do charged balls feel a force as they accelerate towards each other?

Vor 5 Tage
Narf Whals
Narf Whals

@cardayz I'm not actually sure. An object of perfectly even density, or a point charge, would possibly not notice a force because the acceleration would be perfectly equal everywhere. But any real object would notice a force because any volume with different mass in it feels a different acceleration. An accelerometer would register an acceleration.

Vor 5 Tage
cardayz
cardayz

@Narf Whals Good point. That answers a lot of what I was wondering. However, the video uses the argument that falling in free fall is equivalent to free floating (the onboard accelerometer would not record acceleration). Does the same apply to charges accelerating towards each other?

Vor 5 Tage
Narf Whals
Narf Whals

It is not actually identical to gravity because the mass doesn't cancel out. F=qq/r²=ma The force is proportional to only charge, so when you divide by m to get the acceleration you can't cancel anything in the middle term. That being said there is a theory that phrases the electromagnetic force as curvature in an extra dimension. https://en.wikipedia.org/wiki/Kaluza%E2%80%93Klein_theory

Vor 5 Tage
fessit
fessit

If 1g acceleration is the same as 1g on earth why does a person age less accelerating at 1g than someone on the earth. Clearly they don't have the same effect.

Vor 5 Tage
Nixon
Nixon

That’s why time ticks slower near objects

Vor 5 Tage
thomas aquinas
thomas aquinas

Well, technically gravity is the effect of matter curving space without energetic events. However, in his thought experiment, Einstein showed that gravity was in fact indistinguishable from force...

Vor 6 Tage
Narf Whals
Narf Whals

He showed that it was indistinguishable from _acceleration_ not from force.

Vor 5 Tage
Craig Fordyce
Craig Fordyce

Great! Now that gravity is eliminated, can we do the same with death and taxes?

Vor 6 Tage
King Celestial
King Celestial

It's is what it is

Vor 6 Tage
Sigurd Breivik
Sigurd Breivik

But if we are constantly accelerating upwards, doesn't that mean that our speed is constantly increasing? Or does that only apply to Newtonian?

Vor 6 Tage
Narf Whals
Narf Whals

Yes that doesn't really apply. He explains in the pinned comment what it means to accelerate while standing still.

Vor 6 Tage
VINOD KUMAR SHARMA
VINOD KUMAR SHARMA

12:32 KNOCK OUT

Vor 6 Tage
Kyle Mcmullen
Kyle Mcmullen

So here is my understanding, and my crazy question: I imagine this description of gravity and space-time as a 3D or 4D grid in the universe. lines representing space time, all equal. when there are bodies of varying size and density (planets, stars, etc) this grid compresses around them; essentially the lines of the grid are pulled into the body, becoming closer but not changing in relative time, giving curvature to spacetime relative to their pull on the lines of this grid. My description is lacking, but imagine a giant grid with black holes of various sizes pulling those lines into the centre. The relative space-time of these spaces doesnt change, even though they are more compressed closer to the centre. If that is correct, in terms of space travel, could you essentially move longer distances in the universe, relative to the enormous grid, the farther one gets away from the planets, stars, and galaxies?

Vor 6 Tage
Kyle Mcmullen
Kyle Mcmullen

or i guess a better description would be inserting these bodies inbetween the spaces in the grid and expanding them, compressing the grid around them.

Vor 6 Tage
Holophrazeinikos
Holophrazeinikos

Wow- Science can be fun- and you can even understand some of it! Thanks

Vor 6 Tage
John G
John G

So if there is no force, what is causing the acceleration?

Vor 6 Tage
John G
John G

Was he and his house in a vacuum?

Vor 6 Tage
Duck
Duck

This made me THINK dude

Vor 6 Tage
Nahulanham
Nahulanham

In curved space analogy using the ball orbiting (for a while) the central point, aren't the going in a straight line, though they appear to travelling in a circular orbit (or in Keplar's sense and ellipse?) I have John Wheeler's book on this curve.

Vor 6 Tage
Perry Winkle Elliott
Perry Winkle Elliott

if gravity is not real as you say then why do you fall at different rates of speed in different gravity say for example if you jump off a 100 story building on jupiter or the same hight building on earth different mass of planet = different gravity readings different rate of acceleration toward the ground on witch ever planet and if your on a planet that's not spinning then you would fall in a straight line as well so its all relative to the viewer gravity is just a way to measure mass really and bending of light could just be because photons have mass and mass is attracted to mass might not really be bending time and time is also relative to the viewer if you were in an event horizon but somehow alive and unharmed you would perceive time as going buy at normal speed to you the viewer but if you looked out the universe mite seem to have stopped moving

Vor 6 Tage
Perry Winkle Elliott
Perry Winkle Elliott

also things don't fall at the same rate on earth drop a feather and a rock and the rock hits the ground first i have done it lots you meant to say in a vacuum i'm sure in a vacume its true but don't forget about the thick air around us it affects things of little mass a lot get rid of the air tho and its the same

Vor 6 Tage
I
I

No time has nothing to do with it, because time is only a calculation of motion, a calculation acts upon nothing, what scientists call gravity is actually "counter space" True "space" AKA volume, mass, something that takes up a spatial footprint, always has a opposite reaction called "counter space" it's only "space" and "counter space" Also known as the "ETHER"

Vor 6 Tage
I
I

AETHER

Vor 6 Tage
Bobbie
Bobbie

Ok my problem to understand here is that if one person stands on something tall on the north pole and someone else is standing on something tall on the south pole they will both be making contact with the floor. But that means it accelerates in two different direction. Please can someone explain?

Vor 7 Tage
Narf Whals
Narf Whals

It does accelerate in all directions. And it does so while standing still. He explains more about that in the pinned comment.

Vor 6 Tage
John McKown
John McKown

So there is no gravitational field, like there is a electromagnetic field. And there are no gravitons, like there are photons. So there cannot be an anti-gravity device. The closest might be a space "straighter" device? Or perhaps some device which pushes all the particles in its area of effect in a specific direction, which would mean that nothing in that field would feel any acceleration, kind of like free fall.

Vor 7 Tage
Hung Su
Hung Su

How are the ocean tides involved in this explanation?

Vor 7 Tage
Hung Su
Hung Su

@Narf Whals Thank you.

Vor 6 Tage
Narf Whals
Narf Whals

Tidal forces happen when the geodesics aren't the same for all parts of an object. The moon changes what the geodesics around earth look like, but it does so more on the side that is closer to it than on the other.

Vor 6 Tage
Samer Najjar
Samer Najjar

At 13:15 you said that an external observer will still see the light travel in a straight line inside the accelerating rocket ship. Why though?

Vor 7 Tage
Narf Whals
Narf Whals

The external observer will see the light travel in a straight line because there are no forces on the light. So it just moves in a straight line as things with no forces on them do. He will see the light hit a lower spot on the opposite wall because that spot accelerates "up" to meet the light beam.

Vor 7 Tage
Naeem Baluch
Naeem Baluch

i am actually amazed 😮. Since school we were told Gravity is real but damn gravity doesn't exist.

Vor 7 Tage
Das Kuch
Das Kuch

the way you visualize light and how it seemingly "bends" is so unbelievably cool.

Vor 7 Tage
Adikara Maulana
Adikara Maulana

thats explaining how naruto's sage mode really works

Vor 7 Tage
Ihsahn Åkerfeldt
Ihsahn Åkerfeldt

If gravity is just an illusion and it's actually the earth accelerating upwards, answer this question: why is it that air resistance manages to slow down the fall of light objects with considerable surface area like a paper or a feather but not rocks? This is a factor that is clearly dependent on the falling object, which according to this Einsteinian view is actually inertial while the earth is accelerating upwards. Makes no sense. Does anybody have any idea?

Vor 7 Tage
Narf Whals
Narf Whals

@Ihsahn Åkerfeldt The air doesn't get in the way of the ground. It moves with the ground and gets in the way of the falling object. Just like the ground does when you're standing on it. The terminal velocity through the ground is 0.

Vor 7 Tage
Ihsahn Åkerfeldt
Ihsahn Åkerfeldt

@Narf Whals The supposed acceleration of the ground should not be affected by air being there because the former is so massive and, again, we're told here it's the ground that's actually moving.

Vor 7 Tage
Narf Whals
Narf Whals

@Ihsahn Åkerfeldt The ground pushes the air along. So it also rushes up to meet the falling object. And in doing so it pushes on the object.

Vor 7 Tage
Ihsahn Åkerfeldt
Ihsahn Åkerfeldt

@Narf Whals Why does air matter when it's supposedly the massive ground rushing up to meet the "falling" object?

Vor 7 Tage
Narf Whals
Narf Whals

Falling through air is not actually inertial. The air does the same thing as the ground. It pushes objects off their geodesic with a force that is proportional to the surface area that is exposed to the air. Only falling in a vacuum is inertial motion, which is why all objects fall at the same rate in a vacuum.

Vor 7 Tage
SalaryMan
SalaryMan

it makes me thinking back to moon landing. if planet earth is accelerating up (which is relatively true, by mathematical calculations and observations), why did armstrong was in a "floaty-state" when he was allegedly on the surface of the moon? (by which, doesn't seems to be complementing this equation?) or am i too thick to understand this now? somebody please enlighten me!

Vor 7 Tage
Ihsahn Åkerfeldt
Ihsahn Åkerfeldt

Iirc the astronauts were not floating weightlessly. They could jump higher and stuff (because of weaker gravity) but they would land back.

Vor 7 Tage
Usama Iftikhar Butt
Usama Iftikhar Butt

Having difficulty understanding this video. Watch this one https://youtu.be/wrwgIjBUYVc This guy create really good visuals.

Vor 7 Tage
The observer 1
The observer 1

I prove gravity by telling you a story of place I can't be but if you assume I'm right then you too can believe in gravity

Vor 7 Tage
SHIVAPRASAD NAYAK
SHIVAPRASAD NAYAK

Nice video

Vor 7 Tage
Mister Super Cool
Mister Super Cool

Gravity isn’t a force because Gravity is a potential of Inertia in disguise under the veil of curved space https://youtu.be/s-aO3Y6JvIk

Vor 7 Tage
juma Abu Nasser
juma Abu Nasser

Gravity is a hoax

Vor 7 Tage
mizo mint
mizo mint

I feel like 390lbs...

Vor 7 Tage
Felipe Gaete Román
Felipe Gaete Román

I think that's exactly why we see the earth flat, because the space-time is curved, and the sphere looks flat.

Vor 7 Tage
Felipe Gaete Román
Felipe Gaete Román

@Narf Whals Yes I know this is because perspective, but when you approach from space, at the beginning you see the earth round, and as you come closer, you start to fall into the ground and the sphere is transformed into a horizon (sky up earth down). I don't know how to explain well.

Vor 7 Tage
Narf Whals
Narf Whals

We see the earth as flat because we are tiny and the earth is large. The curve of the earth is too big to see from our perspective.

Vor 7 Tage

Nächstes Video

Parallel Worlds Probably Exist. Here’s Why

20:00

Why Does USB Keep Changing? | Nostalgia Nerd

20:51

Why Does USB Keep Changing? | Nostalgia Nerd

Nostalgia Nerd

Aufrufe 1 600 000

i've got some casual news

31:16

i've got some casual news

Samantha Ravndahl

Aufrufe 420 206

Del Monte is Dead to Me

19:28

Del Monte is Dead to Me

Markiplier

Aufrufe 3 091 473

The Insane Biology of: The Octopus

21:27

The Insane Biology of: The Octopus

Real Science

Aufrufe 2 200 000

The Infinite Pattern That Never Repeats

21:12

The Infinite Pattern That Never Repeats

Veritasium

Aufrufe 8 000 000

Which Way Is Down?

26:11

Which Way Is Down?

Vsauce

Aufrufe 18 000 000

Why The Speed Of Light* Can't Be Measured

19:05

Why do prime numbers make these spirals?

22:30

Why do prime numbers make these spirals?

3Blue1Brown

Aufrufe 2 600 000

Brown; color is weird

21:15

Brown; color is weird

Technology Connections

Aufrufe 2 200 000

World's Lightest Solid!

12:02

World's Lightest Solid!

Veritasium

Aufrufe 24 000 000

Erkennst DU den Song? (mit badmómzjay)

11:10

Erkennst DU den Song? (mit badmómzjay)

World Wide Wohnzimmer

Aufrufe 290 455

Bachelorette 2020: Die Ioanni-Lüge!

18:37

Bachelorette 2020: Die Ioanni-Lüge!

Alicia Joe

Aufrufe 57 478

RUTHE reagiert auf REZO

0:13

RUTHE reagiert auf REZO

ruthe.de

Aufrufe 189 924