How fast are you moving right now? - Tucker Hiatt 

Girlfriend: "I think we're moving too fast." Me an intellectual: "Relative to what?"

TED-ed: "Space is not an ocean, it has no substance as water does." Space: "Hold my Higgs-Boson."

every time I watch Ted Ed, a nuke goes off in my brain

You know how fast you're moving? Relative to what? To that sign on the road that says the speed limit!

Just got this as a notification 5 years after its posted Thank you RU-vid

I absolutely understood this 100%.

This is so humorously amazing, and I live for this kind of narratives 💜

For those who are familiar with the metric system: At 0:20: "So, a second tempting answer is, 30 km/s around the Sun." At 2:16: "Earth's speed is 30 km/s relative to the Sun." At 2:25: "Your speed is zero relative to your easy chair, but depending on where you sit, it is hundreds of, if not over a thousand, kilometers per hour relative to Earth's center."

I still want to know how fast I'm moving. He never did answer the question. Dang!

I love these kind of videos, the animation, and the examples that fully explain the question instead of just answering it.

In Star Trek, warp speeds are defined relative to light speed through a vacuum, which according to relativity is an absolute speed.

I’m curious, does this mean that the speed of light is only a relative measurement too? If not, how can we ever get a consistent measurement of it, seeing as we are moving so quickly through the universe.

It would have been nice to know what speed we were going relative to the things you mentioned.. Virgo cluster etc..

Me:How fast are we moving? TEDEd: no

So How fast am I moving right now?

''Some things are absolute'' War. War never changes. 5 days.

Space is full of radiation and subatomic particles. It's not really a void, relatively, lol.

A more accurate answer, from a relativistic perspective: Everything moves at exactly the speed of light through the 4 dimensions of space and time. The faster you are moving through the 3 spatial dimensions, relative to a reference point, the slower you move through time from that reference. Things are still relative, but the vector always adds to the speed of light. At least, that's one way to always answer "How fast are you moving?"

That analogy of space to a hole is the best explanation of what space is that I’ve heard.

2:42 A physics lesson about constant, relative, and absolute speeds, and yet fire exists within water. I'm done.

space is not a void.... it's not empty.... it maybe doesn't have any physical substance or mass, but it's not nothing, it's not completely empty :) There are many energies involved in the creation of the universe. I mean, if space was nothing, then gravity wouldn't exist, since planets bend both space and time...

2:53 *Vsauce music begins*

I've never heard of this idea of "deeply real" in physics before, but it's an incredibly useful concept. It deserves to be more widely known.

I always stand still : entire universe only moves around me. ;-)

Thank you so much for how you explain everything.... makes me so much happier to finally understand about local standard of rest... relative and absolute etc

this lesson gave me headache ..

Is anybody else annoyed at the fact that at 4:55 the spaceship is spinning the opposite direction that the arrows point?

This was a relatively good presentation.

For people who dont understand, if you are sitting still on a chair, you are not moving relative to your chair, but you are moving in different speed relative to the people walking or driving outside

Our speed relative to the Virgo supercluster is a significant fraction of the speed of light, meaning we are moving forward faster in time than someone at the center of that supercluster. How long things take to happen in the universe is relative too.

Let's just say you were somehow able to go to the edge of space. And let's just supposedly say that you were able to survive. What would exactly happen? Is there anyway to escape this boundary? What would be on the outside of space? If space is expanding, then is there something bigger than space? What is space expanding into? What if it really isn't space, but the space outside of space is the true space, or maybe space is expanding into the void. But if there are boundaries, than wouldn't there always be something beyond those boundaries?

Officer: "Have you any idea how fast you were going?" Me: "Relative to how late I am, I was driving very slow."

I thought we humans knew everything.. Actually they don't know what is speed...

The police: u know how fast u r driving? Me: show him/ her this video Also the police: u r arrested for making my mind nuke

i lovee love teded's starting tune playing while the brain/face is shown

That's fine and all. However, I was trying to find out how fast the Earth is moving toward the Great Attractor in the center of the local Laniakea Supercluster. And you wasted my time by not coming out at the very beginning and saying that you would not actually be answering the question you posed.

No idea, but I know exactly where I am.

Latest update: Space is something. It can be bend and stretched and has infinite energy per volume unit. It is also expanding faster and faster ( accelerated) at an actual rate of 71km/s for each megaparsec (1 parsec= 3.2 light years)

I wish my teachers were able to break it down like this when I was a kid.

Ted-ed: How fast are you moving right now? Me watching this video 7 years later: About 7 years slower.

Just got home from jail for asking cop “relative to what”

1st reaction: That's a meaningless question without specifying a frame of reference. Answer: Pick a speed - any speed less than c - and that's how fast I'm moving, relative to some reference frame. With one caveat: There is one arguably universal reference frame - the rest frame of the Cosmic Microwave Background. Fred

Rotation is absolutely real? Kurt Gödel disagrees. = ) en.wikipedia.org/wiki/G%C3%B6del_metric I realize that I am being overly pedantic, but the possibillity of space itself rotating is fun stuff.

속도가 무엇인지에 대한 영상 잘 보았습니다. 과학에서의 속도는 무엇에 상대적이어야 한다는 게 참 흥미롭네요. 자세히 들여다보면 우리가 일상에서 쓰는 표현들 중 틀린 것들이 참 많은 것 같습니다. 유익한 영상 감사합니다!

One thing is for certain is that since I am born I have never occupy the same position second after second. And I will never occupy a position I have previously occupied. Same for every particle that constitutes me. And it's extremely unlikely that a particle occupy the same exact location that has been occupied by another particle. So maybe every location is unique and is used just once.

does that mean we are moving fast and also not moving at the same time?

I like the speeding joke at the end ;) . cute lol.

Would have been good to hear the different relative speeds, if they are able to be estimated...ie speed of earth's rotation, speed of earth's orbit of the sun, speed of the sun's orbit of the centre of the Milky Way, speed of expansion of the Milky Way etc

Officer: Excuse me sir , do you know how fast you were driving? Me: Relative to what officer?

Space is not pure void it is full of fields. Some excellent documentaries on that subject right here on utube.

SPEED IS KEYYYYYYYYYYYYYY

I lost you at "how fast are you moving?"

A more clever answer to the police officer would be "No, but I know exactly where I was".

Time's relation to speed makes it even more fun. Time is far from our linear notion of it. Make a vid about that.

The only reason this wasn't answered was because we don't know how fast the Virgo Cluster moves...

Why do the astronauts look so smug? I think they're up to something...

Space is not nothing. Its very much something. It can be bent and thats been proven

This was an informative video, but I was hoping we'd actually be given an estimate as to the speed of an object on earth relative to the largest frame of reference (presumably the center of a galaxy supercluster) we can measure. Including _Star Trek_ was kind of confusing because it's not real, and as much as us Trekkies wish otherwise, subspace isn't. Finally, my last question is about rotation; why _isn't_ it relative? Sure, if you're seeing your surroundings whirl rapidly and/or you feel your insides churning thanks to a force of gravity pulling more strongly in one direction, you would get sick. But if you were in the vacuum of space so far away from anything substantial that there would be essentially no pull of gravity in a particular direction, and if your eyes were closed so you couldn't see things spinning, how would you be able to tell? This video is great in explaining the concepts of relativity but seems to have a lot of flaws. Just keeping it simple and avoiding making false analogies would have prevented this confusion.

Need to update this. Physicists now say that space is not nothing. Space may be quantized. Space can warp, waves travel through it. Space is something.

Simple way of thinking about it: someone running past you vs someone running with you

Thx for posting, this is helpfull stuff.

and when you are in that prison you an rise your fist in the air and scream out "but something are absolute" as you drop the soap to the ground.

Prepare ship for ludicrous speed!

How fast are you moving right now? *runs around the house*

but how can speed be relative when the change in speed is absolute? absolute change in speed means you can measure the speed of an object just by knowing the current energy and mass of the object and adding a unit of energy to it - if a thing begin to move much faster by that tiny amount of energy, you will know it's running at slow speed, while if you notice almost no effect, you will know it's moving at a higher speed. Also, we already know you can't go faster than the speed of light. if there was a thing such as relative speed, that would mean you can look at an planet going 150% the speed of light away from you, and you see an object that assumely is crushing the speed of light when infact you both are moving 75% the speed of light away from each other.. with the correct formula, you shall be able to measure the absolute speed of a person just by measuring the change of speed in relation to the added energy the person uses when he start walking? if you have a correct formula you shall notice that it requires just a little bit more energy to go towards than with the rotation of earth

what about the speed of light?

sweet ending

Scientists say that it's impossible to accelerate an object to the speed of light or little less than that. But that speed is relative to what?

I am moving with the equal magnitude of motion as is the magnitude of motion of the speed of light. But, most of my motion is across the dimension of time, and the remainder is spatial motion.

Why didn’t you show the adding up of all speeds for the scenario you mentioned in the beginning e,g speed of sun, speed of our Milky Way and so on.... it would have been interesting to find that !

possibly you are moving faster than speed of light.....if consider the speed of galaxies

Why would you go to jail for speeding

I'm not moving I live on static flat plane.

The police officer says "relative to me"

Can't we just measure it relative to light to make it somehow absolute? I mean we have a speed of light constant. As a rule of physics we know that nothing can go faster than it. So let's say if a spaceship goes close to speed of light, we can't say it's going faster than light relative to smth, but slower than light relative to smth else. First statement will be wrong relative to physics :) right? We're using caesium-133 element to calculate time( atomic clock) precisely. So let's say we build an arm(tail) to the back of our spaceship. And we point a light from that tail's end towards the back of our spaceship for a second. Then check when that light reached to back of our ship. Isn't it possible to calculate our precise speed with that way relative to light, which is a constant :) ?

All this talk about speed and movement, and not one mention of Isaac newtons laws of motion

WRONG from minute three on. WHO peer reviews these videos ? Just because it is in the a Ted named channel does make it accurate.

This is a subject I find really hard to explain to other people down at the pub (I'm not as boring as I sound, I hope) but you guys have covered pretty much all important factors when it comes to speed/relativity. Very good. Big thumbs up!

Cops: How fast you were going? Me: relative to what? Do you think this response won't upset cops?

My brain needs a new pair of batteries after watching this

Interesting thought arises here. If every speed is only relative to reference objects, then why can't we go faster than the speed of light? What is the "absolute" reference point we will be moving away from that "knows" we're over the speed of light? Like, if all the stars, planets and galaxies are all moving in different directions anyway, any one motion we are making is going to be towards some, away from others, and all at varying degrees of reference, depending on THEIR speeds. But, how does the universe know you've hit light speed? Are you passing particles of some "ether", or crashing through "gravity waves" (analogous to sailing through the ocean), or passing by some so-far-unknown relativistic "grid of quantum particles" making up otherwise "empty" space?? Highly unlikely. So, how do we know we've hit light speed when all of our reference points are moving around us? I bet this gets into incredibly tricky relativity issues, because even though the Lorentz contraction and effects of time dilation would be visible on the speeding person from outside, from inside the actual moving frame of reference everything would seem fine. But how does the UNIVERSE know you're approaching, or have hit, the speed of light, since all the references are moving? There's got to be SOMETHING that is forming some absolute comparative reference. Just wondering......

We are always moving at exactly the speed of light through 4D space-time. When we focus all the motion on space, we stand still (don't age) in time (as photons do), and when we focus all the motion on time (age fastest), we stand absolutely still in space (impossible to achieve?). That's why c is the limit and that's how I understand it anyway.

Space isnt even considered a void anymore though technically considering quantum fluctuations in even a vacuume empty space isn't empty

next time my boss ask me how fast can i finish the task he gave me, i'd ask him back, relative to what, boss? :)))

it all went above my head.

So the speed of light isn't absolute. It's relative to something? What a bullshit video. We feel acceleration and rotation because of inertia. But that doesn't mean that some movements are relative and others are absolute. They are all absolute. Our feeling doesn't have anything with it.

The orbital velocity of the Earth plus or minus the approximate rotational velocity, depending on whether you're on the half where spin is towards the direction of orbit or the half where spin is away from direction of orbit, with some variation based on geographical location as well as where along the point of rotation you happen to be.... In other words, 30km/s plus or minus an additional 460m/s... Typically the speed a person is moving at on Earth creates an inconsequential change, though I suppose if you want to be technical about it you''d also need to factor in any other velocity in excess of about 100mph, as well as it's direction relative to both the surface as well as orbital trajectory of the planet.

why don’t we put the relative to what in a vacuumed space stand still

Should the term "nucleus" or "core" be preferred instead of "centre"?

Then you add the speed of light and suddenly speed is absolute again especially if you move close to light-speed.

Warp speed is relative to the speed of light in a vacuum which is constant, not some arbitrary location just like Mach 3 is 3 times the speed of sound (at the current altitude) not 3 times Los Angeles.

CMB dipole. If you measure a CMB dipole, you are moving relative to the observable universe. We measure a dipole of 323 km/s, and in a particular direction. Dopler shift.

Speed as is time, are values of energy and both are values of the origines potential energy where no energy is absolute zero.

Then why cant we get to the speed of light? I mean if speed is relative then relative to one object we might be at rest, and relative to another object we might be moving faster than light. So what does it mean when they say nothing can move faster than light? If anyone can explain please do, cause I'm genuinely curious 🧐.

is there such thing as coordinates in the universe or space-time? if every particle of matter were to be removed, will speed still be a thing?

Yes I definitely understand.

Relative to the center of the universe, which is expanding at an accelerated rate, couldn't we say our speed, or at least that of our supercluster, is the integral of that?

after my science teacher showed my class this video for a lesson, she asked me how fast is a car moving if it is moving at 18 meters per second and i answered. What is it relative to and she laughed alot.

Absolutely...love it

Excuse me...but space it is Something ( video states is nothing); even, space has motion ( gravitational waves).