Why Gravity is NOT a Force

  Weergaven 3,802,903

Veritasium

Veritasium

20 dagen geleden

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 NLposts 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
nlposts.info/project/ILl8ozWuxnFYXIe2svjHhg.html

Reacties
Veritasium
Veritasium 14 dagen geleden
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.
D D
D D 2 uur geleden
@JAW BL4Z3R Space time curvature causes the effect which is called gravity force in Newton's law of gravity.
adorable
adorable 5 dagen geleden
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Stiffydart
Stiffydart 2 uur geleden
ALFRED? Shurley shome mishtake.
Long Dong McStrong
Long Dong McStrong 2 uur geleden
THE EARTH IS FLAT
Long Dong McStrong
Long Dong McStrong 2 uur geleden
That animation at 5:45 was so clear, amazing!
Sid Bonkers
Sid Bonkers 2 uur geleden
This made my brain itch
Jake Stewart
Jake Stewart 3 uur geleden
I know this doesn't have much to do with the video, but I would like to share these questions and this message with as many people as possible. 1. What do you think happens to someone after they die? 2. Do you think there is an afterlife? 3. If heaven exists, how do you get there? 4. Would you be good enough to get into heaven? Here are a few questions to see if you are a good person: 1. How many lies have you told in your whole life? 2. Have you ever stolen? 3. Have you ever used God's name in vain? 4. Jesus said that "whoever looks at a woman to lust for her has already committed adultery with her in his heart" (Matthew 5:28). Have you ever looked with lust? 5. If you have broken any of these commandments, would you be innocent or guilty on Judgment Day? 6. Would you go to Heaven or Hell? The Bible says that "all liars shall have their part in the lake which burns with fire and brimstone" (Revelation 21:8) and "Those who indulge in sexual sin, or who worship idols, or commit adultery, or are male prostitutes, or practice homosexuality, or are thieves, or greedy people, or drunkards, or are abusive, or cheat people - none of these will inherit the Kingdom of God" (1 Corinthians 6:9-10). So, if you are guilty of any of the ten commandments, then you are in trouble when Judgment Day comes! Do you know what God did for guilty sinners so that we wouldn't have to go to Hell? 2,000 years ago, God became a human being, Jesus of Nazareth, who suffered and died on the cross for our sins and rose from the dead on the third day, defeating death. The punishment that we deserve for breaking God's law, Jesus took in our place. He paid the fine that we could never pay so that God can legally set us free by forgiving our sins. He is just, by punishing evil through Jesus’ death on the cross, while being rich in mercy towards us. What you have to do is repent, or confess and forsake your sins, and trust alone in Jesus Christ. Don't trust your own goodness, because, as Jesus said, “No one is good - except God alone” (Mark 10:18). Trust alone in the savior. The moment you do that, God will forgive every sin you have ever committed and grant you eternal life, and He will give you a new heart with new desires, so that you will love to do what is right. You will be born again. But you must repent and trust in Jesus. When are you going to do that? Here is a short Christian movie on this subject and depression: nlposts.info/past/mpXX3N28g4l_1Jc/video
D D
D D 2 uur geleden
The power of Scientism's pronouncements is greatly enhanced by the fact that its rituals and observances are powered by technology and science, and therefore its clergy can reliably produce "miracles" on demand: the "Holy Food" is actually medicine, so it really does cure the sick; the throne of the King of Anacreon is really a flying machine, so he can truly levitate over his subjects with a glowing aura. So deep is the indoctrination of the priesthood that they continue to believe in the miracles, even as they themselves work the technology to make them happen. Most significantly, Scientism can follow through on its threats when the people offend the Galactic Spirit, casting the navy adrift and shutting down the entire planet except for the temples, with a word from a priest. en.wikipedia.org/wiki/Church_of_Science
Søñû Røy
Søñû Røy 3 uur geleden
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 world.♥️
Birol Gökçek
Birol Gökçek 3 uur geleden
The things I didnt get it is that in giving explanations, for moving objects follows space-time curvature in which that makes sense. But when two masses are stationary relative to each other, they still pull each other ( gravitational force ??? ) and each objects start to accelerate & gain speed. I am sure we in a rocket would not feel this acceleration. How can we explain this in space time curvature.....? What makes these two stationary masses accelerate to each other? Can someone please explain it for me?
Reanetse Moleleki
Reanetse Moleleki 3 uur geleden
"I know it sounds crazy." Is usually something someone says before telling you vampires exist.
EpicLittleGamer
EpicLittleGamer 4 uur geleden
Cool
DURREL LEE
DURREL LEE 4 uur geleden
But one can say space time is curved due to massive objects is because of gravity space time is the field* gravity operates on so the curvature of it is the force of gravity because by definition gravity is a force just because you won’t experience it does not mean it is not happening so it is not an illusion
Rob Louw
Rob Louw 5 uur geleden
No gravity - Einstein was wrong - and Newton - a gentleman by the name of Nikola Tesla disproved gravity - his findings are only coming out now - about 100 years after he shed light on these subjects - is the earth a globe?
Johnny Car
Johnny Car 5 uur geleden
I told my friend every thought is manifested into the physical realm at the subatomic level. 🤓 metaphorically speaking every object that experiences gravity is therefore a perspect of its opposing object. An object that does not have a perspect could possible be a black hole. A black hole is a star that is basically halted in time and space. Literally ripping the “fabric” of what we call reality. That’s what I think of when I think metaphysics. I would need to do actual research. 🥺🦆
Johnny Car
Johnny Car 5 uur geleden
What is the word for [anti]gravity?
Varen Aggarwal
Varen Aggarwal 6 uur geleden
So where does gravitational waves fit in?
botcrack
botcrack 7 uur geleden
8:33 that is not me...you need a much fatter marker for that to be me, lol
D Bila
D Bila 7 uur geleden
mind boggling, yet, crystal clear explanation
Mister Super Cool
Mister Super Cool 8 uur geleden
Gravity is Not a force because Gravity is actually Inertia in disguise under the veil of curved space nlposts.info/past/p1_Hs5a9bIGurp8/video
CivilisatoPedia
CivilisatoPedia 8 uur geleden
👉 If you are interested in history & mysteries then my last video is for you ✨👌
Rus Boh
Rus Boh 8 uur geleden
In this case the larger object suppose to have less wait on planet then smaller one. Or smaller objects always under curve of larger one? Still curve doesn't explain everything neither gravity. More sense makes that it is expanding with that acceleration, I mean all of us and everything around us including space, no one will never prove what I said or can contradict it. It's where our logic useless, it's like talking about infinity or how everything started to exist, we could only make tales like big bang or so... Some gurus know more than scientists, they do not need those answers they just using this all, which we call as a life to expand faster than ~9.8 m/s :) even during the physical life and that's how we see miracles happens around the world and science can't explain it. We have enough space in infinity to expand that fast, but our mind would blow up thinking to much how big we are to compare to the past and still how small, looking in the sky!
Michael Olefir
Michael Olefir 9 uur geleden
Einstein used only 2 D, where all lines kross each others, in 3 D, most of lines meeting - poins is parallel and dont meets together automatically, in 4 D will all lines meet together in big circles ....
KevinPlayz 86
KevinPlayz 86 9 uur geleden
Stop the cap this is sponsored by among us
John sarab
John sarab 10 uur geleden
But what about the perspective of the one experiencing the 1000 foot fall (and death).
John sarab
John sarab 10 uur geleden
lose power at less than orbital path you will be drawn to Earth. That is not a force? Relativity is not the only 'story' possible.
Regenarc Canis
Regenarc Canis 10 uur geleden
What about the tides how is the ocean pulled towards the moon. What this video talks about makes sense...
John sarab
John sarab 10 uur geleden
But gravity FORCES us towards the ground.
Star_Nutron
Star_Nutron 10 uur geleden
Absolutely loved the video. Although I still have thousand questions in my mi d, I so wish I hd access to this video back in high school when I was studying gravity! Thanks Derek!
Blue Neck Pictures
Blue Neck Pictures 10 uur geleden
Could you do an episode defining space time?
ChrOnicKPoP
ChrOnicKPoP 11 uur geleden
Ok then how are we measuring Gravitational waves on Earth with a Laser instrument? IF there is no gravity? Clearly I'm missing a whole bunch here :)
indra purnama
indra purnama 11 uur geleden
does this also work for electrical and magnetic field? so they just bend space time for charges?
Stinger Bee
Stinger Bee 11 uur geleden
Please explain gravity waves.
Muggle
Muggle 11 uur geleden
Wait... There's TWO of them..?
Junky Magi
Junky Magi 11 uur geleden
Ugg, amateur proves he is an idiot at 2:20 "man falling is not accelerating he is not in a gravity field" except he IS accelerating. Everyone know that if you fall 1 foot and hit the ground=ouch, fall 100 feet and hit the ground=splat why? because all the while you are falling, you are accelerating faster and faster, someone in orbit around Earth is falling, it's just his angular speed makes him fall AROUND the Earth, instead of INTO the Earth...
Andrew Martin
Andrew Martin 12 uur geleden
I just got done watching a video were you talked about gravity existing. And how do ocean tides work if there is no gravity? I'm confused can you help me understand?
Andrew Martin
Andrew Martin 11 uur geleden
@veritasium
Andrew Martin
Andrew Martin 11 uur geleden
And aslo how do planets stay in orbit around the sun if there is no gravity
Bugfish
Bugfish 12 uur geleden
Great video and nice examples!
Mike Abbott
Mike Abbott 12 uur geleden
Great video!
Jason Workman
Jason Workman 13 uur geleden
So if we are accelerating somewhere, where are we going? And at what point do we reach our maximum speed?
Shane Parr-Whalley
Shane Parr-Whalley 13 uur geleden
So gravity isn’t real? What causes planets for example to orbit around stuff? Trying to process all this xD
Johnny Sokko
Johnny Sokko 13 uur geleden
If mass can bend “spacetime” then as massive object moves thru it then space time should be compressed in front of it and dragged behind. Prove this.
Kyle Wilson
Kyle Wilson 13 uur geleden
If gravitation isn't a force then it cannot do work. It cannot accelerate masses. That also means that one COULD differentiate between an accelerated frame due to external acceleration from gravitational acceleration...which I believe is one of the axioms that drove the development of general relativity.
John deVoursney
John deVoursney 13 uur geleden
I expect this question has been asked and, ideally, answered in one of the 32K+ comments below. But here it is from me: How does mass curve space time?
Truth Seeker
Truth Seeker 13 uur geleden
Such bs!
Tekanova
Tekanova 13 uur geleden
Questions: Is this the first time this video has been posted(October 9 2020)?
Johnny Sokko
Johnny Sokko 13 uur geleden
Newton > Einstein
Dimitris Balios
Dimitris Balios 14 uur geleden
Wait ! Phoebe was right?!
Icon Matrix
Icon Matrix 14 uur geleden
Sorry, but the claim that, "Gravity is NOT a Force", is demonstrably false when the explanation in this video is examined in further detail. The primary reason is that the initial premise requires an inertial frame of reference and ONLY an inertial frame of reference. However if we remove that requirement by adding power to the rocket, which in the real world is done all the time. The rocket can in theory, travel an entirely independent and perfectly straight path through normal space to any massive object. This would not be possible if space were actually curved, because the powered rocket would have to travel "outside the curve" of spacetime, which would be like hyperspace. Clearly however, this doesn't happen and doesn't need to happen. Therefore space itself cannot be curved. What General Relativity does, is provide a mathematical analogy that is useful in predicting the behavior of things in space. That is perfectly fine, but let's not confuse models with reality.
Brainfryde
Brainfryde 14 uur geleden
I still do not see how you have proven the opening proposition here though. The nature of the observer and curved space time is great and all, but you do still have acceleration, and you do still have a force that can be calculated by measuring the discrete mass and its proximity to another discrete mass. Energy is transferred, work is done. A gravitational field still exists, but here you have shown there is no force within it, only a different way of looking at curved space-time. You have the acceleration, only showing planet hits stick instead of stick hits planet. What you have not shown is why stick stops accelerating when it is no longer in contact with the planet, and why that change in acceleration is not the result of force. Even drag is measured as a force, so this is where you lost me, even after the curved space-time. Btw, the gravity well thing was awesome. It didn't help me with this idea, I got that from your other stuff. I just never understood why people were so fascinated with the stretched cloth to show gravity / relativity. Geodesics are described by changes in three dimensional changes in vector, but that is not the same as curved space. So I always saw the missed vector change, not the straight vector - curved space of relativity :) You smart, help me brain!!
Robert Preisser
Robert Preisser 14 uur geleden
Spacetime being curved (statically at least) actually does not explain why an object at rest relative with the surface of the Earth is still accelerating at all. An object sitting on the surface of the Earth would be at rest relative to the statically curved spacetime and so would not experience any acceleration at all. Which would be nice because then none of our bathroom scales would register any weight at all! :) How do you account for objects at rest relative to one another experiencing acceleration due to gravity, when both objects are at rest relative to the statically curved spacetime surrounding them. Something fundamental is missing, here. And before anyone answers we are at the “bottom” of a gravity well, that doesn’t work because that is imposing a force of gravity on top of the curvature of spacetime, when the whole point here is that gravity is nothing more than the curvature itself.
MoVieZafterMidNiGhT
MoVieZafterMidNiGhT 15 uur geleden
Earth spins at about 1000km an hour creating an upward force countering the downward force of gravity... if Earth stopped spinning we would be without an equator & we all become flattened from not having an upward force to counter gravity.. which could happen if all the glaciers melt with water dampening magnetic fields and we have a pole reversal, we would(and are going to w/global warming) slip into a mega ice age. Gravity is the electrical covalent bond between ALL matter, no matter how small & is why your space journey is far from any large bodies of mass. Earth orbits around the sun at about 170 000 km an hour and the space station orbits at about 17 000 km an hour...not exact estimates.. which looks like where you mention "space time" with what looks just like the moon orbit around Earth. Your losin me man, i feel like next your gonna tell me the Earth is flat.. lol.. JK
Cordell Blaine
Cordell Blaine 15 uur geleden
Mind.. Blown... Very interesting! I added to my "watch later" - will need to watch it a couple of times. Very good video!
Dizy Deus
Dizy Deus 15 uur geleden
while I already understood from the video the logic of motion being relative and planets constantly moving through the space-time, something still bugs me and feels like it wasn't addressed, and I'm not exactly sure what. Maybe the question - if there was a planet (huge mass) that was stationary (not moving through space-time, just like the "free-falling objects"), does it mean it would not produce the (illusion of) gravitational pull / force?
The Ultimate Reductionist
The Ultimate Reductionist 15 uur geleden
But you still can't explain why Australians don't all poop & pee on themselves when they defecate upside down. Or maybe they do. i dunno.
Bryan Conyers
Bryan Conyers 15 uur geleden
But i thought they found Gravity waves
Ordinary Mo
Ordinary Mo 15 uur geleden
"gravity is well approximated by Newton's law of universal gravitation, which describes gravity as a force causing any two bodies to be attracted toward each other, with magnitude proportional to the product of their masses and inversely proportional to the square of the distance between them." en.wikipedia.org/wiki/Gravity
reneblanco1
reneblanco1 16 uur geleden
Total nonsense, it's a good discussion. However as a fighter pilot, we maneuver around the fact that we have 1G (Earth Gravity), the aircraft performance/maneuverability is based on 1G (Earth Gravity. So we have other tools to compensate for gravity, like thrust...
James Brunton
James Brunton 16 uur geleden
Space is accelerating down, we are definitely not accelerating up.
Gary Palmer
Gary Palmer 17 uur geleden
So here is my question. If there is such a thing known as a graviton. Would that then make gravity a force or still no?
ja v
ja v 17 uur geleden
The guy falling has weight on top of him
Angel L. Peña
Angel L. Peña 17 uur geleden
"LITTLE ROCKET MAN!!!"
Eric Johnson
Eric Johnson 18 uur geleden
Just curious... do falling objects on the moon fall at the same rate as the same object on the Earth?
Maxim Alempie
Maxim Alempie 18 uur geleden
The first direct observation of gravitational waves was made on 14 September 2015
Suryansh Dhiman
Suryansh Dhiman 18 uur geleden
u surely deserve more, i subbed 🤘.
MrMustangMan
MrMustangMan 18 uur geleden
i dont agree, bro......
ozmo69
ozmo69 18 uur geleden
If earth is moving up in one direction. Lets say north and people feel according to their frame of refrence and when people Jump they come down. But people in south would jump and not come down because earth will be moving in their reference when they exert a force and move away they should be a little behind. BC as we know earth is not flat?
Eric Johnson
Eric Johnson 18 uur geleden
Gravity, being a force pushing up on the feet? Ha! I'm with Newton on this one... the weight of my body is clearly pushing my feet down on the floor due to the mass of the Earth interacting with the mass of my body. Exactly how they interact really doesn't change how my physical body behaves. This falls under the category of lying with statistics, or in this case, general relativity... when I jump, not that I do anymore, some force is acting on my body to put it back on the ground. Time and Space exist independent of matter. All matter and energy have frequencies... and those frequencies interact with all other matter... sure. And the Universe Mother Spirit has the power of antigravity in her wheelhouse. And some people can levitate themselves. All fun facts, but practically speaking, I'm happy with the Weak Force concept for gravity, thank-you very much.
Rick Owen
Rick Owen 18 uur geleden
How do you think real UFOs (acknowledged by our military and government) work?
ThreeForFree
ThreeForFree 18 uur geleden
One thing I've never understood about the accelerating reference frame analogy is that if you were in an accelerating ship as shown in the video, objects near the top and bottom of the ship would accelerate at the same rate, because they aren't moving to the floor, the floor is moving to them, however, if you were sitting on the surface of the earth, the object near the bottom of the ship would accelerate faster because it's closer to the earth, and acceleration due to gravity increases the closer you are to the attracting mass as shown by the formulae near 11:45. But this would mean you could tell the difference between the ship sitting on earth and accelerating through space, which shouldn't be possible. So what am I missing? put simply, If you measured the deflection of two horizontal lasers, one at the top and one at the bottom, of the two ships, what would you see and why?
ThreeForFree
ThreeForFree 18 uur geleden
One thing I've never understood about the accelerating reference frame analogy is that if you were in an accelerating ship as shown in the video, objects near the top and bottom of the ship would accelerate at the same rate, because they aren't moving to the floor, the floor is moving to them, however, if you were sitting on the surface of the earth, the object near the bottom of the ship would accelerate faster because it's closer to the earth, and acceleration due to gravity increases the closer you are to the attracting mass as shown by the formulae near 11:45. But this would mean you could tell the difference between the ship sitting on earth and accelerating through space, which shouldn't be possible. So what am I missing? put simply, If you measured the deflection of two horizontal lasers, one at the top and one at the bottom, of the two ships, what would you see and why?
ChrOnicKPoP
ChrOnicKPoP 18 uur geleden
I don't follow how the earth as a sphere is accelerating outwards without expanding..
fergabmmx
fergabmmx 18 uur geleden
meaning the planes near the sun moving in a faster orbit will have more gravity than the far way orbit planets regardless the planet mass then Neptune with 1.14 G should be less than Earth since earth moves at 66,615 miles per hour an Neptune only moves at 12,146 miles per hour
Terence Chi
Terence Chi 20 uur geleden
I have a simple question: Assume 2 cars accelerating toward each other. From each driver's perspective, they see the other car coming close at 10m/s^2. It could be one car stay still and another car accelerate at 10m/s^2, or both car at 5m/s^2. However, the force these 2 drivers feel on their back is different in these 2 scenarios. It seems that only using the earth as frame of reference can explain the difference. Why? What make the earth so special?
Robert Santoni
Robert Santoni 20 uur geleden
If Gravity isn't a Force, what caused the Big Bang?
Case Bone
Case Bone 20 uur geleden
To distinguish your frame of reference, all you have to do is open your eyes/window and look at the rest of the universe. When falling, you know it's not the same as floating in a spaceship once you hit the ground, even though it looked like it for a moment. It's like closing your eyes and pretending the bullies aren't there. Works fine for a little bit. It's astonishing that the smartest people one earth believe this. Call me an idiot but I'm not buying it.
Jolstra Terra
Jolstra Terra 20 uur geleden
So does make me question. What did they detect in this case then for this? (The absurdity of detecting gravitational waves by veritasium) nlposts.info/past/naLOx9yyjX18lmQ/video
Michael Simon Giesbrecht
Michael Simon Giesbrecht 20 uur geleden
if this were true the earth would be gaining in size It isn't is it
Jamaluddin Khalifa
Jamaluddin Khalifa 20 uur geleden
it's annoying me how that "planet" about 4 minutes in is one of the moons of Jupiter... Callisto or Ganymede
Jamaluddin Khalifa
Jamaluddin Khalifa 20 uur geleden
just checked. it's Ganymede.
Gulam Ahmed
Gulam Ahmed 21 uur geleden
This video is the best you have ever made , from my initial frame of reference.
Ń Ĕ O Ń M Ú Ś Ĩ Č
Ń Ĕ O Ń M Ú Ś Ĩ Č 21 uur geleden
Yah scientists are mad goodluck on proving that is Right and maybe i hope you Didn't left speechless on that stage!!
Atharvan Mangalapalli
Atharvan Mangalapalli 21 uur geleden
What about the apple and Netwon? The apple just curved towards his head? Apple moved along curves spacetime and Newton accelerated towards it?
Atharvan Mangalapalli
Atharvan Mangalapalli 21 uur geleden
Does that mean Gravitational constant and Newton's law of Gravitation are not something we should be reading?
Teguh Tanudjaya
Teguh Tanudjaya 21 uur geleden
Interesting but why did newtonian theory where gravity exist, works well with nowadays equations? Especially in engineering like construction, etc. I mean we can't use relativity in civil engineering for the example. Then how about centripetal and centrifugal forces? If gravity is not a force, then people standing on earth while constantly moving up was due to inertia cause by earth's rotation? *confused screaming
Mr. Quiroz Astorga
Mr. Quiroz Astorga 21 uur geleden
What if i'm a metal touching a magnet? I know magnetic fields do exist, so how is this different from the accelerating rocketship / standing up on earth analogy?
javal Gandha
javal Gandha 22 uur geleden
This video was brilliant and Profound. Thanks Derek. Keep up the awesome work.
Tyson Zion
Tyson Zion 22 uur geleden
Those bastards lied to me
JeTeL
JeTeL 22 uur geleden
those are some serious accusations here; so, how exactly is spacetime curved around/under/for/.../ myself, when i am standing on the surface of planet? maybe simple picture, animation...because it just doesn´t seem to make sense at all, no matter how i put it...
cobra3289
cobra3289 22 uur geleden
If gravity is not a force, what force is pressing my body to the ground?
Patrick Harvey
Patrick Harvey 22 uur geleden
#ElectricUniverse?
Javier Albinarrate
Javier Albinarrate 22 uur geleden
Answering 7:49 "Are you watching this in an inertial frame of reference? do you feel weightless?" I am sitting at the toilet right now, does that count? I certainly feel a lot less weight than a few minutes ago.
Fook Billgates
Fook Billgates 22 uur geleden
Flat
Jamaluddin Khalifa
Jamaluddin Khalifa 22 uur geleden
i thought i'd NEVER understand relativity... and this video gives me hope that i might JUST about be able to understand it...
Jamaluddin Khalifa
Jamaluddin Khalifa 20 uur geleden
@bouytt guyt i don't fully understand it yet and this is the best i can do. its a long explanation. bear with me. if you are in deep space, far away from all massive objects like stars and planets and moons, then at your location the 3 dimensions of space are all straight. if you enter a region near a massive object, you will begin to move towards the massive object at a constant velocity because massive objects bend the 3 dimensions of space around them. you right now should be traveling towards the centre of the Earth because it is a massive object, so it bends space around it, and you're in that region of bent space. but your path to the centre of the Earth is blocked by what's beneath your feet. the reason why you don't just fall straight through whatever is beneath your feet towards the centre of the Earth is because the thing beneath your feet is continually pushing you away from itself. the fact that you are being continually pushed means that you have a constantly increasing velocity. so although you aren't moving, you are still accelerating. we're stuck to the surface of the Earth because it bends the space around it, and the bending of space makes us move towards the centre of the Earth at a constant velocity, but we can't actually move towards the centre of the Earth because the floor or the ground is in the way and we can't just go through it, so we're stuck on the surface of the Earth. whatever is in the way is continually pushing us away from itself, which means that we have a continually increasing velocity or that in other words, we are accelerating, even though we are stationary. actually, we are stationary BECAUSE we are accelerating away from the Earth, NOT "even though" we are accelerating. because the floor or ground is continually pushing us away from itself, causing us to accelerate away from the Earth, the bending of space by the Earth is unable to make us fall towards the centre of the Earth at a constant velocity. the acceleration stops us from falling and keeps us stationary. i feel that there's a few gaps in this explanation. bits of it might actually be totally inaccurate. like i said i don't understand it fully myself yet.
bouytt guyt
bouytt guyt 22 uur geleden
So we are stuck to the earth because earth is moving which pushes us to accelerate on the ground? sry I’m not that good in science 😅
MrRexQuando
MrRexQuando 23 uur geleden
Love your videos! So I think 3 things kind of blow this up: 1. Convection 2. Spinning masses 3. Negative free-air gravity anomalies discovered on Mars If you can create your own reference frame (such as an IMU) doesn't this go against the very example of pass by a planet? If this weren't the case how would our solar satellites navigate other than optical references? If a spinning mass and it's apparent change in gravitational influence doesn't invalidate the whole space/time thing I don't know what does. Spinning or not it should have the exact net effect as the attracting body has no awareness of the spin.
bouytt guyt
bouytt guyt 22 uur geleden
I identify as an inertial observer
Alan Brewster
Alan Brewster 23 uur geleden
he filmed himself pedaling on stationary bike
Binod RR.Empire
Binod RR.Empire Dag geleden
Plz Read :::Can i please know why an object is said to accelerate by 10m/s every second while falling from height,,,If the earth is accelerating instead of the object.If earth is accelerating then the earths acceleration must increase 10m/s every second.Is it??Plz do answer.I am satisfied with this definition of gravity but not fully.
bearbro 123
bearbro 123 Dag geleden
whos here cuz of community montessori ICP
Mihai Ciocoiu
Mihai Ciocoiu Dag geleden
Could you please buy markers that don't make that noise? Great video and all, as always. Thanks!
rolmops
rolmops Dag geleden
I just had that "aha" moment. Gravity is, in a way, an effect of time. You can't stay in an inertial reference frame around mass, because that would require you to stay in the same spot in space and time relative to everything (or nothing). The bigger the mass of the body you stand on, the more you accelerate away from a straight line in space time, and the more time dilates from an other non-relative observation point. Need to find a better way to explain this, but gravity as an effect of time (and thus space-time) makes sense
hEY you
hEY you Dag geleden
well it will be a 50 years before it is learned in schools.
Jeremy Acton
Jeremy Acton Dag geleden
Some scientists point out that was actually shown that the sun did not bend distant starlight with the curve of its local spacetime as 'predicted'. It was a refraction effect that occurred only in the solar photosphere, and 'gravity' did not bend light.
Pablo Escobar
Pablo Escobar Dag geleden
Electric Universe explains it simpler.
Pablo Escobar
Pablo Escobar 3 uur geleden
@jpt Thornhill, W., “The Z-Pinch Morphology of Supernova 1987A and Electric Stars“, IEEE Transactions on Plasma Science, Aug. 2007, Volume: 35, Issue: 4, Part 1, Page(s): 832-844 Ransom, C.J.; Thornhill, W., “Plasma-Generated Craters and Spherules“, IEEE Transactions on Plasma Science, Volume 35, Issue 4, Aug. 2007 Page(s):828 - 831 The SAFIRE plasma reactor: replicating the atmosphere of the sun in a laboratory on Earth.
jpt
jpt 14 uur geleden
@Pablo Escobar Can you cite a confirmed prediction made by EU? How about a peer reviewed paper? Any technology developed using EU?
Pablo Escobar
Pablo Escobar 16 uur geleden
@jpt Of course there is math, Birkeland currents are mathematically modelled. Of course there's predictive capability. So you are saying you need others to make up your mind?
jpt
jpt 16 uur geleden
No it doesn't. There is no math or predictive capability. No peer reviewed research. Electric universe is a scam.
Cholo Segovia
Cholo Segovia Dag geleden
I just realized on the second half of the video how cute he is. lol But kidding aside, I learned a lot from this video. And it's weird how when a question comes up in my mind, he addresses it right away lol
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