Brian Cox visits the world's biggest vacuum | Human Universe - BBC
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- Опубликовано: 23 сен 2024
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Watch the BBC first on iPlayer 👉 bbc.in/iPlayer... Brian Cox visits NASA’s Space Power Facility in Ohio to see what happens when a bowling ball and a feather are dropped together under the conditions of outer space.
In this episode, Professor Brian Cox explores our origins, place and destiny in the universe. We all start our lives thinking that we are at the centre of the universe, surrounded by our family and the world as it spins around us. But the urge to explore is strong. Brian tells the story of how our innate human curiosity has led us from feeling that we are at the centre of everything, to our modern understanding of our true place in space and time - that we are living 13.8 billion years from the beginning of the universe, on a mere speck of rock in a possibly infinite expanse of space.
Human Universe | Series 1 Episode 4 | BBC Four
#bbc #HumanUniverse
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I love the fact that they know exactly what's gonna happen but still find it marvelous when it happens.
Shows that atheists are not nearly as sure as they pretend to be. In fact, sure of nothing.
They spend money and 3h of their time just to film this. Idiots, they don't need chamber this big, and best of all it is a cornerstone law of physics, so better believe it and go to the pub.
It is the most satisfying thing in science to predict something and then see it follow your prediction
@@metroid1 Of course.
@@g4macdad Wait so only atheists believe in gravity?? I really don't understand what atheism has to do with this video. But if ur wondering why scientist make a smile when theories gets proven correct, its simply the fact that in science u have to prove to be right. Even tho we know pretty much 99% that a theory is correct we still have to test and prove till we truly know the facts. On the other side we have people like u, who i assume is religious. Would u say believing a book written by who ever 1000+ years ago is being critical? Sure u can believe it, that's up to u and i have no problem with that. But in science we actually try our best to look for the facts and explore this wonderful world and universe. If everyone was just gonna read one book and not keep looking for new answers we would not be here on a computer watching this video right now. U should never underestimate the importance of science. And also, there are multiple scientists with religious beliefs.
Imagine Galileo seeing it he would have cried watching this amount of beauty.
Wasn't Newton the one who predicted that a feather and a brick would fall down at at the same speed if air resistance wasn't present?
Oh my bad, just checked and turns out it was Galileo, thanks
@@theseductivepotato7459 newton just prove mathematically the concept
@@emanuelxavier9923Physicists always prove things mathematically.
@@theseductivepotato7459 500 years before Newton and Galileo, it was said in Arabic book written by Abu'l-Barakāt al-Baghdādī. , u can recheck
Everyone's saying their teacher forced them to watch this but I came here myself....
Same
LOL me too
Same lol,there is no more beautifil thing than be passionated and curious about science,in every form it takes
Q: What if there was an exterior magnet that balanced the middle in-between magnets g-force rotation around center magnet? 😁 Also my opinion on gravity is that exterior of planet earth is the condensed pressure on to earth pushing objects down that are not closest to its properties (likes attract) oil and water separate and decide position from the greater amount of mass that surrounds the smaller volume of mass. Is this possible? Please explain. Thanks
same
Not having this in real speed is the most frustrating thing that has happened to me in like 5 years!!! Imagine the chance of seeing a feather fall like a rock! Instead we get slow motion and the feather falling like we always see it falling.
it's really driving me crazy
ditto, not sure wtf they were thinking
Yep! Seems a wasted oportunity. Those science guys aren't as smart as they make out!
Exactly
bro, it is for you to observe better:) still fascinating to see in slow motion.
I love the look on the Engineer's faces, they know it, but to see it.
Yes, knowing something and seeing it with your own eyes are two different things.
One of the Apollo 14 astronauts, Edgar Mitchell, once said in an interview that the lunar mission changed him from having an _intellectual_ understanding of the immensity of the universe and the Earth's tiny place in it to having a deep _gut_ understanding.
That was full speed u loony
@Bugs Bunny It was already "shattered".
The engeneers probally never did this experiment until cox told them, so thats why they are amazed, or they had not done it in a couole of years
If know somthing its not mean you be tierd too see it again .like seeing you family or eat your Favorite food.or listening you do it all your life you dont bored
In Nasa research center, they countdown from 10 before flushing the toilet
HAHAHAHAHAHA
Lol
and call out "preparing for drop"
And gravity pulls the shit out of their ass
Yes.
Why did they show it in slowmo only? I'd have loved to also see it in real time :(
Seeing a feather drop to the ground as fast as a bowling ball would've been the much more interesting shot IMO
Yeah, it slightly piss me off the lack of real time shot.
I'm pretty sure that the bowling ball would fall at the same speed as the feather
Watch in 2x speed 😎
@@invisyTAF Nope, it's the feather that fall faster without attrition
It's NASA on BBC...
Absolutely fascinating. Makes me wanna become a scientist. You can see how enthusiastic they are about it all makes me smile and its one of the most beautiful videos I have ever seen
Being a scientist or an engineer is a very rewarding career. A lot of frustration and issues to solve but when you get something to work as you intended, the joy is immeasurably satisfying!!!
You should give it a try! The world could always use another scientist!
Find wht u love and apply science to it
I’m sorry but what every person wants to see is a sheet of A4 paper go down perfectly straight and not do flips
the feathers didn't move but hit the ground with so much more force and speed than with resistance, feather/paper very similar
and do not slow it down and show the same slowed down footage 17 times...
Nice pic
momo cheers, assuming you are talking to me
True, a sheet of paper would be more impressive.
Who else is watching this in 2020 because your teacher made you
okay but what conclusions did u get, cause they asked me that and I have no idea m8
@@AndreaVegaa Theres gotta be a reason that the apple falls "Down" to the earth instead of going sideways or continuing up. He then developed a theory that there was a strange invisible force pulling things to the centre of the earth called "Gravity" And then he did a bunch of math and found out he was right.
me from Japan
Y e s-
H e l p-
yes from French
I'm actually so frustrated that they didn't show this in normal speed. I want to see feathers fall at regular speed. Wtf is wrong with the producers?
For once in our life we get to see feathers fall really fast. And then they slow it down!
didnt wait till the end of the video huh?
Michael Mannucci same!
+誰誰在
Yes, it realy sounds stupid. Why do you think it was faked? What results have you expected?
i did but it only showed one second of it
I am 62 and no teacher said I should look those videos. They are interresting for me...
I can't believe they never showed it fall at full speed! We've all seen bowling balls and other heavy object moves in slow motion...that's not unusual at all. But to see a feather fall quickly from that height without it being disturbed by air around it, that's novel! And yet the editors chose to leave out that footage entirely. I feel robbed!
they did show it towards the end pay attention
gonedeadforlife You got a timestamp? Cause I never saw it fall in real time.
Tony Bullard 4:13 they show it a little enough to see what it looks like
4 minutes and 41 seconds, and only about 3 quarters of a second, in a super wide angle, is at actual speed. Very lame.
Completely agree. Right from the first second of the video, that was the footage I was waiting for. Pretty disappointing.
I wanted to se how weird it would look if the feathers was falling fast, as fast as the bowling ball. But of course this was in slow motion.
Mazeu here’s a similar experiment doing showing full speed
ruclips.net/video/s9Zb3xAgIoY/видео.html
it has been done on the lunar surface.....
set video speed to 1.25
oh wait 1.5 rather
forget it, i tried 2.0 still shit like my suggestion
This is one of the most beautiful video I have ever seen. Years and years of humans pushing their knowledge just to understand the working of the universe in a much better way.
And yet some people still claim it's all a lie and "fake news".
Those people shouldn't breed.
@@KissMyFatAxe it is fake lol
@@attav8 Dont breed
The feather’s move right as they are released, this is suspect. Why the slow motion and cut shots too? Man, show it in real time, uncut as well. Too many talented special effects folks out there to not have the uncut real time footage shown as well.
@@KissMyFatAxe This test didn't answer the question if things are upside down how that things are attracted towards the planet
özcan aykın'dan geldik :))
TCHUPVIEJEN
aynen öylee
Thinking of how Newton and Galileo would react to this, seeing their lifes work in action, puts a lump in my throat , they were two astounding human beings.
Well, they observed it right but explained it wrong. It was actually Einstein
I love this comment
Some day we will be able to go back in time and tell them 😉
@@lucaslinares7806 Im sceptical about time travel, 🤷🏻♂️
@@WildPhotoShooter it was not Galileo, he just copied it...
It's the most beautiful thing to watch, ball and the feather falling together.
It would be if they didn't slow it down
@Filthy Animal it's still slower than real-time speed
All that work and you never bother to run it at normal speed. Which would sell the whole element of heavy and light moving at the same speed. In slow motion it just seems dreamy and unreal. I don't get why people have a hard time getting this. Show both slow and normal speed if you have slow motion.
+FleaOnPeanut They wont show it in live speed because they can't. its a crock of shit and they know it which is why they are laughing their tits off. people have well and truly duped if they believe this crap.
Ah, right. This is why I shouldn't post comments on youtube. Thank you for reminding me. For the record I do like this video, and my gripe was with a technical style choice. I won't respond after this comment. Take care.
+FleaOnPeanut The slow motion is there so you can clearly see that they are travelling and accelerating at the same ratio. And of course... for dramatic effect. I agree on that part that they should have showed it at normal speed at least once.
+FleaOnPeanut Modern Science has to be fluffy and dreamy. Personally, I want real and I want facts.
+Andrew Jackson
The bowling ball will fall faster in a vacuum than in air, both the feathers and the ball are slowed by air resistance.
I think what I love most of all is how all the seasoned NASA engineers are still nerding out about it. They put men on the Moon, the concepts involved in this experiment are child's play for them. But seeing a bowling ball and a feather fall at the same time, seeing that visceral smack of the feathers and watching the equations you use everyday come to life is still special.
IF, you were inside this vacuum chamber and you wanted to first toss the bowling ball and feather up to the height where they fell from, then obviously the Force required for the upward proper acceleration on the bowling ball would need to be much greater than the force required for the proper acceleration on the feather. After they reach the same height they fall at the same rate regardless of their masses. That is because there is no force downward when an object is in the coordinate acceleration of free fall. The same experiment can be done in an accelerating spaceship.
@@davidmudry5622 IF, you were inside this vacuum chamber, you couldn't throw the bowling ball... you would be dead.
the thing that hurts me most in this age of conspiracy is the lack of curiosity and imagination. The curiosity and imagination that sixty years ago allowed extraordinary men to accomplish extraordinary feats
These guys who have been managing this multi million dollar structure are still fascinated by how this known principle of gravity works. That’s what I love about scientists. They are genuinely amazed by their field every time.
That is exactly what makes me suspicious. Their amazement would have faded away long ago, yet they pretend to be amazed for the camera. I get the host, presumably this is his first time...but the others? Seems odd.
If you want to doubt it, y don’t you try to find out for yourself? Instead of taking the easy way out and leaving a comment on a RUclips vid.
@@Razta_S Who says I am not trying to find out how this works?
I guess they a very tight schedule, and this is just a break for them of their daily routine.
I’m not tying to argue with you. I just expressed my amazement. I appreciate your comments.
The fact the second drop was shown in slow motion actually bugged me more than it should.
its 2016, you can make the video run at normal speed yourself.
It's 2017 ;)
Mikes8899 Earth is flat , BBC lies!
you never know, maybe it was sped up!
I am a free thinker like einstein. he would propose that if you can change the speed of the video feed then it is impossible to deduce what initial speed the ball was falling. perhaps without an atmosphere the pressure would cause gravity to have less of an impact, we do see the ball struck the card board at significant force though that is is probobaly not the case, but without a reference its impossible to say for sure. some other interesting observations.
2:53 shows 1 ball 1 feather starting to drop, then next clip is ball and like 7 feathers? ok odd..... then at 4:16 the feather shows much more wind resistance and the ball dropping faster than the feather. and then back to the 7 feathers and 1 ball clip. so badly edited
It's amazing how a crazy scientist named Galileo gave this theory 400 years ago.
Actually the concept is obvious! But we can not see! Do you know how Galileo discovered this? Because he made fall a small iron ball of 10 grams and a paper also of 10 grams from the same high... and he saw that the ball still to arrives in the floor before than paper. So, this means that is not about the weight!!!!
@@lucadipietro2310 Of course its a theory, but that test didn't prove his thought that air resistance was the cause of objects falling at a different rate. The definitive test he made was to create 2 iron balls of different weights but of the same diameter. In this case, both the balls fell at the same speed and that's the proof that Galileo needed to show how the concept works.
@@thevigamerpixerlator what is so bad if it is a theory a theory and a hypothesis are different
@@jonahjerryson4913 I agree, they are. A hypothesis is an assumption based off facts that you may infer to. A theory on the other hand, is a proven answer that is done through multiple testing procedures. That is literally what I was saying.
@@thevigamerpixerlator oh sorry my bad
I love how flat earthers in the comments can't process what happened here so they can't even decide if they should call it fake or invent some new mental explanation for this phenomenon
I teach 9th grade physics, and this video actually confuses my students. This film is the absolute best experimental demonstration of freefall's independence of mass, but it has one confusing point. The film shows the evacuated drop only in slow motion, never in real-time. As a result, most of my students believe that removing the air from the chamber makes both objects weightless and drastically slows down their acceleration. Even though I tell them repeatedly that the video is in slow motion, we know that students often don't listen to what we tell them, instead believing their eyes.
Many of my students write things like this: "Reason why bowling ball and feather hit the ground in same time in vacuum chamber is because less air mean less force which seem like they standing stell and going very slowing down" [sic]
This video would be much better for students if they first showed the real-time video of the vacuum condition before showing the slow motion video, just as they did in the first experiment (with air).
> This video would be much better for students if they first showed the real-time video
Yes, maybe... However, the entire fall takes less then 3 seconds, so that it would be difficult to observe that the two bodies are perfectly synchronized all the time...
just put a small piece of paper over a notebook, then drop them to the ground, the notebook will remove air resistence behind it and the piece of paper won't be affected
@@magoninhogamer
> just put a small piece [...]
And what will this prove?
@@alexleibovici4834 The much lighter paper (feather) without buoyancy/drag coeficient of medium fall at the same rate as the much heavier notebook/book/object. If the paper & notebook is drop side by side the fall rate is significantly differ due to CD of medium. The same principle can be used to safe gas/energy by tailgating a larger vehicle or in race your opponent car/bycycle/etc, or bird formation for lengthy flight.
@@supeskrim
> The much lighter paper (feather) without buoyancy/drag coeficient of medium fall at the same rate as the much heavier notebook/book/object.
This is a completely different phenomenon that the one presented in this video. The one in this video is purported to show that the acceleration of a body does not depend on its mass IF the only force acting on it is gravity.
Couldn't even insert 2 seconds of normal speed clip? Wtf
Rahul Bondar look for the full documentary idiot. You’ll find that they do show it at normal speed. Don’t Rely RUclips showing you everything you want to see.
ruclips.net/video/s9Zb3xAgIoY/видео.html normal speed
Why do you need that
@LUNA GUEVARA hahahaha
@@marvinmartinsYT because......... 9.8 meters per second per second ..... god dammit. The vacuum is to demonstrate gravity interaction in its purest form.
Amazing how slow the ball falls in a vacuum.
Haha
Is this comment serious or not? The shot is slowed down
Eero L.
No, it's not serious.
+Bruce Baxter such sarcasm, much wow
QB Machine
Yes, the ball is slowed by the vacuum so that it keeps pace with the feather
Özcan Hocadan geldik iyi günler
even though I already knew what would happen it still felt so beautiful
Do you know its dangerous to be in a low room?
The music
>see video
>looks interesting
>click on it
>see a comment I made
>forgot I already watched it
forgot i already read this comment
Stop trying to greentext, it's not 4chan and it's so freakin cringey.
>implying
+Cyrus Hinojos fr
Guy: This is NASA's....
I skipped the video
The Music makes the experiment even more beautiful
Know the title?
What’s the song’s name?
Yes thanks to bbc
Ozcan hocama neden telif attiniz 😡😠
hapsjqpskdpqops
TCHUPVIEJEN
Why did your Özcan teacher try to steal the BBC’s copyrighted material? Surely you should know that stealing is wrong?
@@RevolutionibusOrbiumCoelestiumcalm down dude it was just irony ☠️
as an astrophysicist, it gives me immense satisfaction to watch our equations, postulates and study implements accurately as it is explained...
Marvellous video...
Hats off to BBC
It's always nice when the equations WORK! As an amateur ballistician I understand your satisfaction!
"our" equations lol you mean Newtons, you didn't invent them.
They aren't your equations, you haven't come up with anything. BBC didn't do anything either, it was NASA that built the chamber, they were just allowed in to film.
People like you are what is wrong with this world.
? The interesting part of the experiment is seeing it performed in real time. Why on earth didn't your show the real time footage to show how quickly the feathers are dropping? - Physics professor
where's the fun in watching something go so fast that you'd miss it if you blinked.
Bobbie Bees They can show the slow motion later, after showing the real time footage first.
It's rigged pretty high up. The fun is seeing a feather fall as fast as a bowling ball.
Jerry Ross 9,8m/s^2 now happy
+Karim You keep posting the same comment on every thread. So, listen up -- 1.37 seconds is PLENTY OF TIME. The human mind is capable of tracking motion that occurs over a second, ffs. You're basically arguing that if someone dropped something off the roof of a house, it's trajectory would be invisible to the human eye.
The decision not to show the entire drop of both feathers and ball at real speed the whole way through is just baffling (and stupid).
It's gorgeous how a brilliant man gave this theory so many years ago and without be able to verify it with such advanced tools
He was so brilliant that if you read his paper, he actually says, this is what happens but I have no idea why?
He understood, that he didnt have it all.
Einstein worked out why.
Özcan Aykın :)
Physics students after neglecting Air Resistance and seeing this video: This whole operation was your idea, don't blame me!
Air resistance doesn’t play a factor, does it? Clearly this vid shows that it does. But I was thinking about flying from the equator over the North Pole and back to the equator on the other side of the earth. The plane took off we a relative speed of the earths movement at 1000 mph, some how slows down to nearly nothing at the North Pole then manages to regain that lost speed? Also on take off the plane is getting the rotational force of the air on one side of the plane, then once past the pole it’s on the other side of the plane. Do we just not fly over the North Pole due to this? I see pilots keep it simple and assume a “flat and stationary earth”. How the heck can they do that if the atmosphere is moving one way then the next once over the pole? Just trying to learn here. Thanks
Yes how u gessed me i would partner to galileo !
I wonder how much BBC had to pay to pump out the air for the purpose of this 4 min video clip...
Bart Tricas I asked myself the same question xD
Angel Faudoa Did you get an answer?
Bart Tricas
TBH it seemed like a waste pumping out 30 tonnes of air just to drop a couple feathers and bowling ball.
Bart Tricas Haha i was also thinking about all the costs, even when they closed those giant doors i was thinking about elecrtricity costs.
Bart Tricas The electricity is irrelevant, the facility and the people cost the most!
I am an Astrophysicist and I know these kind of stuff very well. But still to this day videos like these make me cry to see physics at this best. Tears of joy rolling down my cheeks.
That reminds me of Apollo 14 astronaut _Edgar Mitchell_ who walked on the Moon in 1971.
He said in an interview once that going to the Moon changed him from having an _intellectual_ understanding of the immensity of the universe and Earth's tiny place in it to having a deep _gut_ understanding of that.
And then you see flat earther cultists and their failed flat earth model nonsense and it brings tears rolling down my cheeks from comical laughter.
can u explain me why feather moved it "hair" at the beggining of falling down? i wonder
@@merihim666 I notice this detail and I don't have an exact answer, but I suppose that this is due not being a perfect vacuum.
Editing: found another 2 comments here:
1) "Inertia."
2) "For every action there is an equal but opposite reaction. As the feathers accelerate from zero the parts that you see move are actually still standing still until they are acted upon. While it looks like they are moving up they are actually being pulled down. Once all parts of the feather reach the same speed there will be no movement."
My conclusion: the feather is not a rigid body, and the feather undergoes sudden acceleration. The softer parts are flexible, and react to this.
@@merihim666 it’s not a perfect vacuum, there is still a small fraction of air in the chamber causing small amounts of feathers to flutter
film sahnesi izliyor gibi hissettim, mükemmel bir şey gerçekten
Wish they had at least one clip of the entire drop without slow motion video.
Wish I could of seen it at normal speed.
+Clint Decker (Louish) you can a bit at 4:16
Grrrrrrrr >:(
Could have*
+Clint Decker (Louish) just watch the video at 2x speed lol
+Nice Try M9 the ball falls faster and the feathers are moved by air at 4:16 watch closely
+Hoo Dini I hate when I do that.
I am a science teacher in Korea. This video is amazing. I really appreciate everyone who filmed the video.
Hi, could you please explain if there is negative pressure in the surroundings when it's made into a vacuum? I'm confused on that.
닥쳐 한국어 여기 초밥이 없어
This video is given to be watched in our textbook
Luv from India 🇮🇳 ❤
what's wrong with you BBC why can't you show the video in normal speed huh?
@Jim Harol I'm no racist but it bugs me that they didn't show it in normal speed
Maybe to show the fall more clearly... because you know it is on Tv and they were probably too lazy to make a normal speed video for youtube
4:14 stfu
@@1989Chrisc 2:53 stfu x2
It would have fallen at 9.8m/s^2, the drop would be over in a second.
I get seeing it in slow-mo, but why the hell would the editors keep the viewers from seeing the whole drop at full speed? Wouldn't seeing a feather drop that fast next to the bowling ball be one of the best parts of this experiment? Not really sure what they were thinking.
Because it's a preview clip and they want you to watch the whole show.
a "preview clip"?? at the end??? cognitive dissonance 101.
Which part of the concept are you struggling with? That this clip is an edited down preview of a 60 minute show or that it's edited to entice you into watching the other 56 minutes?
Unless I'm wrong, I didn't see it in the full version either.
+Jay Bluff What are you talking about, even if that was true why would they show the balls falling at a different rate after they have shown them fall at the same rate just before...
Use your head. Don't just kneejerk away anything not fitting your preconceived belief system. Did you even see my video??
this video sucks in a very good way
It's becuse the machine is a vacuum
leokimvideo holy shoot
god dammit
NUKE did you not get the joke.
NUKE you’re not very smart are you?
özcan aykın 🫡
Hi
are you girl ?
That put a simile on my face. The scientists didn't have this facility back then, yet they predicted it so correctly.
❤❤🎉🎉🫦🤱👙❤️🔥💓💕
God bless
Yes. A lot of things were discovered like this. That's what makes science different from religion. It is specific.
@@pradyumn2692 fax
@@pradyumn2692Not necessarily, because "Science" can be very ambiguous. See the Covid 1984 exaggeration.
> Science can be defined as A group of people in agreement & signing off on A paper that details the degree of consent. While another group can do the exact same thing, while detailing in their paper, A polar opposite conclusion. This happens all the time.
Brought a tear to my eye. So beautiful.
Plot twist: The feather was a paid actor
LOL
It's probably in reverse
that was funny. OH how the flatards must hate this video.
You r a gee
also i think the air was paid to dip
it really does look like its being lowered down using some sort of string up until it comes in contact with the ground though lmao
Just started reading Deep Simplicity by John Gribbin and searched for "objects falling on airless moon" and came right through to this video. Remarkable! Just fell in love with Science once again.
IF, you were inside this vacuum chamber and you wanted to first toss the bowling ball and feather up to the height where they fell from, then obviously the Force required for the upward proper acceleration on the bowling ball would need to be much greater than the force required for the proper acceleration on the feather. After they reach the same height they fall at the same rate regardless of their masses. That is because there is no force downward when an object is in the coordinate acceleration of free fall. The same experiment can be done in an accelerating spaceship.
POV: your on a teams call and you were set to watch this....
Yep
Yep
nope, the algorithm brought me here
lol, yh
Lol
I want to see feathers falling at actual speed, not slow-mo
They would fall with high speed in the absence of air i.e in vaccum
> actual speed, not slow-mo
With the actual speed, the fall takes less than 3 seconds and one sees very little.
Nasa from CGI to SLOW-MO
same bro same...
özcan hocaya niye telif attınız lan AYIP DEGİL Mİ BİRAZ EGİTİM OGRETİME SAYGINIZ OLSUN 😡😡😡
Why did your Özcan teacher try to steal the BBC’s copyrighted material? Surely you should know that stealing is wrong?
We have people like these doing amazing things and then we have the flat earthers. The quality of human is so inconsistent.
I don't think we should consider such a high-praise as to call a "flat-earther", a human.
Flat earth is psyops so you can lump them in with people who have legitimate questions. Id like to se them shoot a rocket in there hanging from a string
the quality of human is also subjective. im sure as far as the universe is concerned both flat earthers and physicists are both equal and merely different
and we have religious fundamentalists, especially Islamic ones, who want to destroy science.
Ya we have people asking questions of the established world view kinda like martin luther newtom and people like the founding fathers! I dont. Believe in flat earth but asking questions does not make you a lesser human in fact it can make you a great human you negative troll!
Incredibly annoying that they never show a full unedited real-time drop.
ikd OMG I AM CRYING FUUUUUUUUUUUCCCCCCKKKKKKK!!!!!!!!!!!!!!!!!!
They can't because that would reveal their deception.
Brian Cox's face is stuck in a permanent smile )))
@Eric Schmidt no one cares lol
I love my uncle 💗
@alex gilmour You know he has a PhD in Physics and works at CERN right?
elijah cox no way?!!
That's because his face is full of Botox to make himself more appealable children.
It really sucks they you didn’t show it in real time
more hints that it's a fraud
True, they should have done the classic "slow motion then normal" thing.
@@__ZANE__ Nope, outside of your paranoid mind there is zero hints of fraud.
People in the comments blaming the slow motion. But people they showed in slow motion so that we could see the exact details, even the minute details. Many people saying that this is fake but it's not. Maybe they haven't learnt gravitation in their school.
@shiroiakuma9656. You write, "People in the comments blaming the slow motion. But people they showed in slow motion so that we could see the exact details, even the minute details." Yeah, we're not stupid, we get that. But *YOU* obviously don't understand the point they're making. We would love to have seen the mind-bending sight of a feather falling like a rock. And they could have easily shown *BOTH* , dude.
Cox's remarks about the equivalence principle in the end are confusing. Of course the ball and feather are not "standing still". They're falling. But according to the equivalence principle this is locally indistinguishable from as if (!) the objects are standing still. The "as if" is crucial here.
The same goes with other inertial forces. Accelerating observers can describe deflecting objects in their frame with newton's laws AS IF there are forces acting on these objects (which, for inertial observers, would move in a straight line). But really, the force (e.g. an engine) is acting on them, not on the objects.
I agree. He totally misrepresented Einstein
What if the objects WERE standing still? Many possibilities in media circles and maybe he doesn't lie.
any links for more info on this?
I came to the comments to find an explanation about the last part because i found it confusing too.
Agreed. Einstein was merely saying which objects were falling, and which were not with no frame of reference would be impossible to tell. They would only be moving relative to each other. Or more specifically the man in space being picked up by an elevator that accelerated at 9.8 m/s^2. Would cause the man to not know if he entered a gravitational field or if he was being accelerated by the make believe elevator. As to why everyone is obsessed with dropping paper or whatever and that this was some how faked is disappointing to see. It doesn't matter what you drop. They took all of the air out. Drop a dude with a parachute it won't work. I sure hope NASA didn't spend millions on this vacuum chamber to simply fake experiments.
Weird fact, if you drop the bowling ball and feather individually, the bowling ball will hit the ground sooner - by a few planck length amounts of time. The reason is that the bowling ball pulls up on the earth with a greater force, and so the earth will move up to meet it by tiny fractions of a pico-metre. If you drop them both together, both objects fall together, they are pulling the earth up at once and so they will hit the ground at the same time.
This is a fun reminder that gravitational attraction is between two objects, but the equal time to hit the ground is the special case of a scenario where one object (the Earth) is much greater in mass, such that the other (feather or bowling ball) is negligible. But on an extreme scale, if you take two of planet Earth and hold them 100,000 kilometres apart, they will fall together more quickly than an Earth and the moon held 100,000 kilometres apart.
To make sense of this comment - imagine two bowling balls in space 1 metre apart at rest with respect to each other and not rotating around each other. Because they both have mass, there is a small but present and measurable quantity of gravitational field between them. Two equal mass bowling balls 1 metre apart will come together at the mid-point of 0.5 metres. Now consider the feather and the bowling ball coming together under gravity. The feather weighs barely anything compared to the bowling ball. The feather will experience the same initial acceleration towards the bowling ball, but the bowling ball will barely accelerate or move towards the feather at all. The feather is travelling almost the whole (0.9999 metres) distance and its acceleration towards the bowling ball is less at future points in time due to not being as close to the bowling ball.
Now consider a bowling ball and an atlas stone (that strong men lift on TV). Because the atlas stone weighs about as much as 20 bowling balls give or take, when they come together, the atlas stone has migrated only 5 cm towards the bowling ball, whereas the bowling ball has moved 95 cm from its initial position (in the frame of reference that defines both as stationary). When comparing the feather and the atlas stone, the feather travels practically the entire metre and the atlas stone moves only a few microns. You would say that the bowling ball falls towards planet atlas in 95% of the time the feather does - when dropped individually.
Now the earth is just a giant atlas stone that has a mass of 6 x 10^24 kg. For ease of calculation we'll say it has the mass of 10^24 bowling balls. When you drop a bowling ball 10 metres, the earth moves up at (10/10^24) = 10^-23 metres (1/87 million of the width of a proton). If the bowling ball is moving at 14 m/s it will hit the ground around 7 x 10^-25 seconds before the feather (the time it takes light to travel 1/4 the width of a proton). For this to be correct, the bowling ball and feather must be dropped one at a time, or else the earth is moved up for both the bowling ball and feather by their combined mass.
Yes, but not if they fall together :)
not really, since they are right next to eachother
Why not show it at real speed?
2,4000 flat earthers were triggered by this video.
And this does not prove or disprove a flat earth. It only shows that air resistance or density is the reason that they fall at same speed. This begs the question can we use 9,8m/s as a standard to measure gravity? I think not.
@@christobotha1700 Actually the reason they fall at the same speed is due to gravity, which is measured in m/s^2, not m/s
Christo Botha m/s^2 sir, if you know what you talking about then you can explain otherwise just don’t...
@@christobotha1700How exactly does falling at the same speed in a near-vacuum prove that air resistance is the reason they fall at the same speed?
@rvidal0001There are circular slits in the dome where the strings come down through for the Sun and the moon. The Sun has a long lasting Duracell battery and the moon runs on cell phone batteries which is why we get 75% moon, 50% moon, etc. Above the dome, the strings are attached to a carousel operated jointly by Eric Dubay, Mark sargent, Nathan Oakley, and Jeran.
this brings tears to my eyes every time I see it.
Wtf how😂
Why tf
i too
Honestly it's the great production value. The music teamed with the slow motion is meant to evoke an emotional response, combine that with the fact that you are clearly involuntarily celebrate and you have tears from observing 8th grade science experiments.
I found this video's link in my 10th physics text book , this is the first time when i felt that physics is so interesting .
Bro sister i found in my 11th book page no.79 samachher book tamilnadu
Probably the best video I've ever seen. I never tire of seeing this. It is humbling.
I love how they play it up for the camera.
"Hey Bob! Come here and look at this thing that we've specifically built this entire chamber for and have already tested 500 times!"
"WOW! HOLY MACKERAL!"
They probably never did this experiment. The chamber wasn't built to hang objects and let them fall.
Everyone has seen an object in slow motion falling slowly, yet that's what you chose to show instead of the object that never falls fast falling as fast as a bowling ball. Good job.
Yes I found that, why not show in real time until the end!!
Because slow motion just shows the same only slower? @@deego911
2:20 I love how these guys wearing SpaceX falcon 9 and dragon t-shirts
Lool
It was the air resistance in space that was stopping the ball and the feather. Because the mass of the ball is heavier, the ball was pulled quickly by the gravity of the earth because of the higher mass. The second factor is the space resistance, since the air has been removed it means that the space inside is squeezed (like when a plastic bag is vacuumed to keep food fresh) so whether the object is heavier or not, that does not matter, the external pull (earth's gravity) is the same!
How much did you pay those Nasa scientists to pretend that this amazed them?
they're great actors though lol
陈鸿 uhhh what?
I've seen this video a couple dozen times, and it amazes me every time I see it!
Why would they have to pay them anything? They're scientists, they know that would be the result, but it's no less amazing to them actually seeing it happen as expected. It's not like they get to do stuff like this with the chamber every day.
aidanjt Ok, that's true. But it still seems a little exaggerated since they just saw it on a screen as well, seeing it in person would be amazing.
That being said, these chambers take forever to cycle, so the long wait may have made it much more special.
I enjoyed the one second they showed it in real time. Other than that, what the fuck man? It's so less interesting in slow motion because that's not how we would actually see it.
applesgosh That's exactly why it was presented in slow motion on purpose. In real life, the objects would be falling too fast for human perception to simultaneously 1) track and 2) detect any change in form, such as relative distances of the bowling ball to the feathers, and the feathers moving or bending, etc. You don't get much useful data out of something if you can't properly see change happen; real-time would be an imperceptible blur to the mind.
SpiritHawk7 Dude we can all tell the difference in distance and speed between a feather and a bowling ball falling in real time. That one second was way more impressive/interesting to watch than watching it multiple times in slow motion. All I wanted to see from this was one full drop in real time, but they ruined it and slowed it down mid-fall, successfully crushing my dreams.
applesgosh you're so right. I ONLY watched this to see something my brain knows as lightly gliding to the ground (feathers) falling as fast as a bowling ball. THAT would be a mind-blowing sight. such a shame - bad editing
applesgosh Yeah, absolutely with you on the editing. They could have squeezed that one second of real-time footage in for this 4 min epic, but no...
applesgosh YES. I watched this on another site but went to RUclips specifically to see if anyone had made this comment.
1:03 - love the way the subtitle writers have capitalised The Force! May it be with you all.
Flat earthers have left the chat 😭😭😭 lol
If this makes your smile, you love science.
i loved physics in high school and college. im now a doctor and searched this up out of curiosity. i started crying cause of how beautiful this is
you cried cause you chose the wrong career 😢
Lmao...
You cried over this garbage??
L
@@TradingJesushow ?
@@sweenytwain7095how’s it garbage?
This video is so beautiful that the gravity force pulled my tears down
Gravity isn’t really a force
@@AquaTurtle1234 explain please
@@AquaTurtle1234 c'mon you ruined the joke
@@attav8 gravity isn't a force hence why Brian cox says the reason the bowling ball and feather fall together is because they aren't falling they are standing still there is no force acting on them at all.
Not a force since 1915, einstein general relativity.
Isso mostra que a gravidade não existe , Porque se existisse o objeto com menos massa seria puxado com maior velocidade. Isso refuta a gravidade. Eles estão em um vácuo onde não há meio(ar) então a força da massa dos objetos são nulas "0"porque não há meio(ar) para esses 2 corpos exercer aceleração. Resumindo os objetos caem porque tendem a cair ,como simplesmente poderiam cair pra esquerda ,direita ou cima. Mas daria no mesmo pois nossa perspectiva seria a msm de agora. Os objetos caírem e um fato. Mas isso n quer dizer q tenha uma força mágica puxando objetos para baixo.
Who else is watching this video in 2024
Can you believe that a flat earther shared this video as a proof that there's no gravity ? I almost had a stroke.
Adnane Roc
Same here. Even worse: They used it to attempt to disprove gravitational acceleration...
Only an idiot believes in gravity show me the peer reviewed scientific study on gravity I'll wait
Yes, I can believe a flat earther would do something stupid.
flat earthers are trolls, what do you guys expect?
Once there was a saying "don't feed the trolls" and you guys forgot about it and now the trolls are feesting with golden forks and spoons...
Some are trolls, some are just ego/money miners, but there are some genuine idiots out there too. And it's hard to pick the trolls from the idiots with flat earth discussions. With most other topics, the trolls are identified as the ones making the outlandish stupid comments, but as you know with flat earthers, they're already making the outlandish stupid comments.
Seeing it over that distance in slow motion is very beautiful.
What i like most about it though is touchdown, where:
1. You see they arrive simultaneously at their end destination
2. Mass does matter since the impact of the big ball crushes the landing surface whereas the feathers do not impact it at all.
yeah as the mass gets bigger momentum gets bigger and makes more damage.
It is, in my opinion, a mistake to have filmed the fall of the two bodies in slow motion. Graphically, it is obviously more beautiful, but it gives the idea to the students that in a vacuum objects fall less quickly (supporting their belief that in space there is no gravity). It's a struggle to explain to them that it's not...
They had to. Because it is fake. Look at their bad acting
@smeeself you believe whatever you are told without using your brain
@smeeself Show me any scientific evidence that the Earth is a globe. Oops you have nothing. Checkmate! All you have is fake images and a belief. If they make you believe in curved oceans and curved lakes then they can make you believe in anything.
@@m.b5777 Hahahahahahh you're really funny
Özcan Hocaya nasıl telif atarsınız lan
+++
Why did your Özcan teacher try to steal the BBC’s copyrighted material? Surely you should know that stealing is wrong?
@4:22 That is why you need 3 points of reference to understand what or who is moving in a space. With only 2, you can't tell if you or they are moving.
Even with 3 (or more) points of reference you still can't tell what's moving and what isn't. For instance if object A (an apple) and object B (a bird) were both seemingly hurling towards object C (the earth) and even though object A seems to be falling faster than object B, who is to say that the bird isn't sitting perfectly still in space while the apple is moving away and the Earth is moving toward it?
Yeah I know- you're mind just got blown again ;)
@@Rick-the-Swift sure you can tell. Compare the distance between the objects and you will know which is moving.
In your example, we know earth will be static so compare a to c and b to c to see which one is moving.
@@HalcyonVoid But we already know the earth is not static and is moving as well. It's what we think we know which causes conundrums, no? Have you ever heard that every single point in space is potentially the very center of the expanding universe? And that if we were to view the universe from any given galaxy- it would seem as if almost every other galaxy were moving away from our perspective? Isn't this an important aspect of Einstein's 'relativity'? If we knew where the so-called 'big bang' happened, we'd know the true center of the universe, and what is truly static, but as it stands you or I could be at the very center and everything else swirling around us. Not likely I know but it's possible I believe, haha Cheers.
@@Rick-the-Swift by that logic, then we could never tell if a car is moving. Obviously we can because we are basing it on a reletive view of the objects
It’s beautiful. It makes me smile every time I see this clip. Yes it was also shown on the moon of all places. Us humans are odd sometimes but hey that’s what makes us unique.
It was beautiful to watch. As was Brian Cox's brilliant smile, lol! I think the astronaut dropped a hammer (more practical than a bowling ball when you're trying to pack light, lol)!🌌💓
I revisited this with some nephews the over day and tried to explain the principles but I think failed as I got confused looks. Should have shown them this video to explain all …
I thought that this place was destroyed by Loki?
I'm so glad I'm not the only one who recognised this place
"I thought that this place was destroyed by Loki?"
Why are you asking us what you thought?
That's a stupid question, only you can answer what you thought or not.
actually Loki rented it to Pazuzu
Aaah. The first avengers movie
@@OriginalPuro is this a wooshed comment?
I love to show this video clip to my science students (Grade 7) in class. It is both eye-catching, entertaining but most importantly, convincing! Seeing is believing!! Galileo would be pretty happy with his hypothesis and now is fully tested. Thank you for the modern technology to create the ideal environment (vacuum state). Professor Cox is really a great public speaker.
2:19 I feel like this would be in a movie idk lol
The villain planning to make the whole world a perfect vacuum..! !
This video was my inspiration to science when I was in middle school, now I’m physics student & I’m welling to complete my studies on this major ♥️
It's incredible how the human mind forget things along the time...For a couple of moments I had forgotten that objects accelerates equally to the ground in a free fall, independently of its mass - and it's more unbeleavable recognise it's exception.
The first video I have watched in 9th class physics period and I can say I love physics ❤
That's good to hear. Thanks
...and to think a man without computers other than his own: His amazing brain figured this out is simply amazing.
Its a hoax you idiot. Why is gravity still only a theory?
Who else is here cause their science teacher showed this?
Omggg mee
Meeeeeee
me!!! lol
Earth in the comments ME
Me toooo
Love Brian Cox enthusiasm doing experiments he must have done before.
This is amazing.
IF, you were inside this vacuum chamber and you wanted to first toss the bowling ball and feather up to the height where they fell from, then obviously the Force required for the upward proper acceleration on the bowling ball would need to be much greater than the force required for the proper acceleration on the feather. After they reach the same height they fall at the same rate regardless of their masses. That is because there is no force downward when an object is in the coordinate acceleration of free fall. The same experiment can be done in an accelerating spaceship.
It's actually beautiful.
Science is beautiful.
Bruce Shark .. it playing with cameras .. it not beautiful.. Brian is a cox edits the film .. why ?
Why can’t they show the drop from state to finish with no edits or cuts ?
@@domesticatedprimate8791 Yes, that is an omission so to say. But maybe there is a full documentary.
No
Felix James Yes
after rajwant sir clsass
They actually demonstrated this experiment on the moon too! You can look it up: Apollo 15 Hammer Feather drop.
Yeah, that was pretty cool.
@Harry Moorehouse : "Who dat?"? Wow, say no more.
@Harry Moorehouse search for “Apollo 15 hammer feather drop” on RUclips, then watch the first search result
Many of us older citizens saw the feather & hammer drop on the moon in 71.
I'm here thanks to my physics teacher. Mr.Aykın❤❤❤❤
IF, you were inside this vacuum chamber and you wanted to first toss the bowling ball and feather up to the height where they fell from, then obviously the Force required for the upward proper acceleration on the bowling ball would need to be much greater than the force required for the proper acceleration on the feather. After they reach the same height they fall at the same rate regardless of their masses. That is because there is no force downward when an object is in the coordinate acceleration of free fall. The same experiment can be done in an accelerating spaceship.
Kütle çekim kuvveti, kütlesi farklı olan cisimler arasında farklılık göstermiyor mu yani ?@@davidmudry5622
Raj want sir