As a Conflict Management consultant, I teach others that conflict (or friction) is not always bad. In fact, we need it for progress---we just need to manage it well. I use the car tire/road analogy all the time! Cross pollination of ideas!
Hey Neil - Still living in denial about UFO evidence from the US military. That is Not what a scientist does - True science is exploring all the evidence.
OMG, Neil just answered one of the longest unanswered questions I had in my life! That movie scene he debunked near the end, about the guy falling off the platform and (erroneously) burning up due to friction... I saw that movie on TV when I was somewhere between 3 ~ 5 and I did not understand what killed the falling guy. This was in the early 60's. I was hoping to catch it on TV again but I don't know if it ever played again. Wow! Thanks Neil, cold... or should I say glaciated... case closed (don't worry, folks, it wasn't like it was eating away at me all that time. Neil just reminded me of it).
Dr Tyson, thank you for your teachings you have been one mentor the I have never meet in person but still have a great impact in my life. Thank you for keeping us thinking and challenge to keep learning
Chuck, intentionally asking a ridiculous question: "Can we ALL get together Every human being Just in one group And start running in one direction Will we speed up the earth?! 🤔🤨" Neil: "Yes 🙂" Chuck: "😶... WHAT?! 🤯"
I would beg to differ since The "Genius ' Visa recipients have a healthy proportion of Indian Citizens. Your education system isn't as wack as you think it is. Your mentality is
@@nineball039 how to shoot yourself in the foot 101 Pupil : Noun ''a person who is taught by another, especially a schoolchild or student in relation to a teacher.''
Friction is a fundamental force that plays a significant role not only in our everyday lives but also in the vast expanse of the cosmos. In astrophysics, friction influences the movement and behavior of celestial bodies, from the swirling gas clouds in nebulae to the interactions between galaxies. One fascinating example is how frictional forces in accretion disks around black holes cause matter to heat up and emit intense radiation, providing critical insights into these mysterious objects. Additionally, frictional interactions are key in understanding how planetary rings form and evolve over time. Given its profound impact on cosmic phenomena, how might our study of friction continue to advance our understanding of the universe and its complex mechanisms?
I don't think I ever had a teacher in all my school years who taught with such enthusiasm for his/her subject ... except my high school physiology teacher. That was a great class!
NASA has not tried to explain this stuff a single time. Honorable Neil Degrasse Tyson, thank you for explaining science in a way that anyone can comprehend.
Hey Neil - Still living in denial about UFO evidence from the US military. That is Not what a scientist does - True science is exploring all the evidence.
Neat, Galileo not only inspired a law of motion for Newton, he inspired calculus for him as well since he essentially employed limits and discovering truths when approaching infinity.
Hello, we can say that the amount of friction is based on the irregularities of each surface and also its compound, so we can increase the amount of friction by those characteristics like tires for drifting or even decrease the rate by fluids and grease such as engine oils. If there was not any friction we even could not have a seat.
An idea of future episodes.... Can you take friction further and relate it to winter tires vs summer tires and slippery road? How the tire compound changes the level of friction and how the mass of the vehicle has a bearing on friction? Would also like to see a comparison of re-entry techniques between the Space Shuttle tiles and the SpaceX powered re-entry on their reusable orbital rocket and their up and coming Mars mission with its belly flop landing.
Heating during atmospheric reentry is caused more so by the rapid compression of gas beneath the object, although there's some friction involved. Also planes need less friction to take off. Imagine a plane of it's belly versus on wheels. Which one will have a harder time? But you need friction to help stop the plane.
I would love an explainer video about how appliances like fridges, microwaves, ovens, etc. work. I get the general concept but I think it would make for an interesting video for all sorts of people
Is friction with the air required for flight? The example you have mentioned the ground but ground friction has no bearing on a plane taking off, it's driving force isn't from the wheels. A plane could remain in place with no ground friction until the requirements for lift are achieved with the atmosphere.
Hello, I'm a big fan of what you do and I have a question, some say the earth is flat others say it's round, I say it's round, but let's say it was truly flat. this would mean that brazil's and Australia, and africa southern tips would be facing in different ways. And If I go to the southern point of all of them how do I see the same constillations, and how do you know we're south is.
I love these thought experiments. I do conduct many inside my head. Like if there were only two lanes in the world with no overtaking : incoming and outgoing, would we need a back mirror?
Professor Tyson, can you make explainer video about "sharpness" in atomic level. How does sharpness breaks the bonds between two elements of a material.
Here’s a question I’ve had since childhood: when gears mesh with each other and one turns the other, is that friction, or some other force? Is a meshed gear somehow different from, for example, a soft rubber tire on a rough road?
When two gears mesh together, one tooth slides on the other tooth which generates point (because they are 3d shapes it would actually be a line rather than a point )pressure where they come into contact which does result in appearance of friction. In the link provided below you can see that point move (green dot (line in 3d)) on the red line ( aka. line of action) www.tec-science.com/wp-content/uploads/2018/11/en-involute-gear-meshing-line-of-action.mp4 In case of gears the actual transfer of power is achieved by shape, not friction.(Unlike eg. belt transmission which purely relies on friction to transfer the energy) in case there was no friction in the world, if the housing where gears are mounted were not physically connected, they would move apart instead of gears turning
which is also why contact gear surfaces are made as smooth as possible and use sufficient lubrication in order to minimize the friction as it generates a lot of heat and all that energy lost in heat was not used in for example rotating the wheels of a car
Neil degrasse Tyson is a treasure trove of information I'm glad their are some people like him to share knowledge with us in a way that's easy to understand thanks to chick as well for being awesome
Question please about the flexibility of the fabric of space-time: we understand, that gravity changes are propagated at the speed of light. That is: if the Sun were to suddenly disappear, our orbit wouldnt notice until 8 minutes later. Also it is assumed, that the fabric of space-time is fully flexible: able to assume any gravity at the speed of light as heavy matter passes through the tiny (planck like) fields that make up the 3D matrix of space-time. But what if these tiny units of fields are in fact not fully flexible: what if the presence of extreme gravity leaves it permanently scarred? As in a black hole changing its position, drifting, moving through space could leave a trail of scarred space-time fields behind which cant resume their original values they had before the black hole passed through anymore? Would we be able to ever detect (by lensing) such scars and could this phenomenon explain the effects we attribute to dark matter? Thank you so much for your education and Chucks entertainment genious! Greatings from Hungary!
I think 11:40 is an interesting point. With friction on Earth, slowing down is "free", but maintaining constant speed must be paid for (fuel). In space, constant speed is free, but slowing down (ex: when approaching Mars) must be paid for.
Sir, @startalk Since, Friction has electromagnetic nature, then why we calculate friction force using Mass of the body and gravitational acceleration, instead of Electrodynamics Forces (Colombian force).
You should talk about static friction vs viscous friction. Mechanical engineers generally conceptualize friction in one of those two ways. The two kinds of friction are described by different sets of equations. But I'm sure that in The Real World, it's not quite that binary.
This all about friction makes sense but one thing,...I understand that friction favours the act of rolling....so, why is there something called ROLLING FRICTION??, I don't understand the mechanical premise of it....I'd be delighted if Neil Tyson eloberated this!!.....
What about Starship? When it is coming down through the atmosphere and it falls with the most surface area downward to help slow it down. Is that not air friction? wouldn't that apply to anything coming through the atmosphere?
Reminds me of the frictionless starship in the parking lot of Douglas Adam's Restaurant at the End of the Universe. You wouldn't be able to even feel it, except as a resistance of forward motion.
@@robbieaussievic I would love to see a suicidally depressed droid called MRV-N in some future Star Wars thing. Just have one character give him a sidelong double-take.
@@toyfreaks .... I was referring to the (1981) TV series, I haven't seen the remake or read the original novel. I tried to watch the 2005 film only made it 6 minutes in, (My limited time on this planet requires selective viewing).
Interesting fact,the old steam trains had a small pipe that released sand onto the track just behind the mains wheels to give it traction/friction to stop the wheels spinning!
Hi Neil, curious about your statement about mounting rocket rocket engines to speed/slow the earth. Would be interesting to know how much force it would take to slow the earth down over a year to slow the earth 1nanosecond per year, 1 microsec/milisec per year. Would be fun way to show how much force the moon exerts on the earth to affect the earth's rotation vs anything man can accomplish.
Hi, guys I have been wondering about quantum fluctuatuons, and I know that the matter suddenly appers in a vacuum. I wonder if it is possible, that matter is somehow connected with the space, in the meaning that it can transfer in the same way that matter can become pure energy and opposite. Meybe when matter appers we are losing space(so little that we cannot even see it)? And when matter dissapears (during anihilation of matter and antimatter) , were getting more space and this way the universe expands. I would be gratefull to you Neil if you could answer this. Greetings from Poland.
Would have been nice if Neil had explained the difference between static and kinetic friction. (Static friction is the reason why the train doesn't start rolling right away when you pull it. Kinetic friction is the reason you require so much less effort to keep it rolling once it starts.)
Plane need friction for takeoff? Nope...it throws back air to go forward... Only for landing it needs friction... . . . . (Although if wee look deeper... The mechanical parts inside plane need friction in some places) 😌
Now I don't know if I can believe him, like seriously what is the universe now if my astrophysicist is lying saying this false accusations, HES MY PERSONAL ASTROPHYSICIST😭
So if we put a refueling station on the moon, they can get rid of a good portion of the heat shields? thereby making the craft lighter on launch and re-entry?
Neil, please do not equate WD-40 with lubrication, because it is not a lubricant in the traditional sense. It was developed as a water dispersal agent. Ergo the WD. The WD-40 company also owns and markets 3in1 oil, an excellent high quality lubricant. They didn't formulate the original 3in1, but now they own it because folks were trying to use their water dispersal formula #40 as a lubricant. No where on the label does WD-40 make any claim to be a lubricant.
I think he's wrong about rockets not using friction. The stuff going out of the nozzle is pushing against the rest of the rocket, that's why there's forward motion. Also when he said that humans are not losing mass when moving, we do. Because we use energy when moving, therefore losing mass.
Every action has an equal and opposite reaction, so friction is not helpful in a rocket. Stand on a skateboard and throw a heavy ball away from you, as hard as you can. The same thing happens with a rocket.
Also, the energy loss when using energy is absolutely tiny. You can rearrange Einstein's equation to be m = E/c^2. 2,000 kilocalories (recommended daily intake for an average person), divided by 300,000,000 meters per second, SQUARED, is 93 millionths of one milligram.
@@ammelr That's irrelevant, since the only reason you can walk is because you are converting that mass into energy. That mass loss is the source of the movement. Otherwise no movement. Also human is moving a very tiny mass, very slow compared to a 100.000 ton rocket at 10.000 kilometers an hour.
@@marble25 You need friction to hold on to the ball. Friction still exists in space between the rocket and its exhaust. But the reason the rocket goes forward is the exhaust going backward - not friction.
I just watched the spaceX Starship 4th flight test and the re-entry... it was still glowing at 10km just b4 falling in the water... It rode that friction allll the way down
Oops. I forgot to preface my last comment, "If I'm not mistaken.." So, Electromagnetism is also one of the Forces, unique from Gravity, if I'm not mistaken. Top of my head.
Neil could've explained in a little more detail how friction affects a plane taking off, since that's probably not as obvious as the other examples at 02:45. He almost makes it sound like it depends on the friction between the tires and the runway somehow.
Don't planes also need friction to stay up? The air moving pass the wings has a longer distance to travel on one side than the other, and the friction of the air molecules on the longer top side of the wing creates an upwards force holding the plane up.
If time and money were no issue, do we currently have the technology required to build a thruster large enough to turn a planet into a space ship? Or given our current technology would any structure that large be too unstable to construct
![BLACK BAG - Official Trailer [HD] - Only in Theaters March 14](http://i.ytimg.com/vi/Du0Xp8WX_7I/mqdefault.jpg)
Neil and Chuck are such a great combo, through the years Neil got funnier and Chuck got smarter, I love it.
So well said ! :)
“And the show quit growing” NDTyson
I'm glad there's no friction between Neil and Chuck!
Wholesome
lol
As a Conflict Management consultant, I teach others that conflict (or friction) is not always bad. In fact, we need it for progress---we just need to manage it well. I use the car tire/road analogy all the time!
Cross pollination of ideas!
As long as cooperation remains intact 😅
Never trust friction. It will always work against you.
I beg to differ sir. If a thing is always a constant, then it is inherently trustworthy.
You can trust friction to always work against you.
@@KevlarIlluminati it “works against” you but the work that it does helps you get places!!!!
@@alternatemusicaddict5226 Not if it’s too much friction!
Hey Neil - Still living in denial about UFO evidence from the US military. That is Not what a scientist does - True science is exploring all the evidence.
Unless you’re trying to start a fire with two sticks
OMG, Neil just answered one of the longest unanswered questions I had in my life! That movie scene he debunked near the end, about the guy falling off the platform and (erroneously) burning up due to friction... I saw that movie on TV when I was somewhere between 3 ~ 5 and I did not understand what killed the falling guy. This was in the early 60's. I was hoping to catch it on TV again but I don't know if it ever played again. Wow! Thanks Neil, cold... or should I say glaciated... case closed (don't worry, folks, it wasn't like it was eating away at me all that time. Neil just reminded me of it).
Dr Tyson, thank you for your teachings you have been one mentor the I have never meet in person but still have a great impact in my life. Thank you for keeping us thinking and challenge to keep learning
I'm partial to non-friction. The people within the fandoms of friction can often be too abrasive.
Underrated comment
You deserve more likes
Chuck, intentionally asking a ridiculous question:
"Can we ALL get together
Every human being
Just in one group
And start running in one direction
Will we speed up the earth?! 🤔🤨"
Neil: "Yes 🙂"
Chuck: "😶... WHAT?! 🤯"
Have you seen the NIKE| Choose Go ad it is already been done lol
I will like this comment so it will have the funny number.
@@godfreyaweror9850 a gentleman
AND a scholar
😄
@@godfreyaweror9850 hahaha you made the funny
Love the way Neil explains things. Brings it down for us mortals. Also he and Chuck work so well together. Excellent!!
Don’t ever stop doing these videos. Thanks guys.
Niel your videos are a slap to the education system that failed to teach us basic science. Just a startalk fan from India :)
I would beg to differ since The "Genius ' Visa recipients have a healthy proportion of Indian Citizens. Your education system isn't as wack as you think it is. Your mentality is
@@garsayfsomali calm your t-ts ;)
@@MrBhavin2000 point proven
One does not need a teacher to learn. You failed as a pupil to learn.
@@nineball039 how to shoot yourself in the foot 101
Pupil : Noun
''a person who is taught by another, especially a schoolchild or student in relation to a teacher.''
Friction is a fundamental force that plays a significant role not only in our everyday lives but also in the vast expanse of the cosmos. In astrophysics, friction influences the movement and behavior of celestial bodies, from the swirling gas clouds in nebulae to the interactions between galaxies. One fascinating example is how frictional forces in accretion disks around black holes cause matter to heat up and emit intense radiation, providing critical insights into these mysterious objects. Additionally, frictional interactions are key in understanding how planetary rings form and evolve over time. Given its profound impact on cosmic phenomena, how might our study of friction continue to advance our understanding of the universe and its complex mechanisms?
I always love Neil and Chuck. They're always hilarious when they are together.
I don't think I ever had a teacher in all my school years who taught with such enthusiasm for his/her subject ... except my high school physiology teacher. That was a great class!
What an perfect timing of this one, currently Types of Forces is been taught in my high school.
NASA has not tried to explain this stuff a single time. Honorable Neil Degrasse Tyson, thank you for explaining science in a way that anyone can comprehend.
Ummm... I believe they have. Besides, there are MANY MANY places where this has already been explained.
I've been learning soo much from all these videos lol
These 2 really make it fun 😁
I'm starting to understand just how completely brilliant Isaac Newton was.
@@koontroll3364 I feel like all science is standing on people's shoulders.
@Tim I guess not only did he invent gravity, but also plagiarism.
If only he knew about American pie
@@koontroll3364 And without friction he would have slid off those shoulders.
I just haven't expected this explainer will include so many things . Great🌠
"Give me some friction!" Will look great on a Star Talk T-shirt!
Awesome man😆
I'd buy it
Hey Neil - Still living in denial about UFO evidence from the US military. That is Not what a scientist does - True science is exploring all the evidence.
More friction!
Save me a shirt👚
Neat, Galileo not only inspired a law of motion for Newton, he inspired calculus for him as well since he essentially employed limits and discovering truths when approaching infinity.
I love how he describes friction as though it's a product he's trying to sell xD
Hello, we can say that the amount of friction is based on the irregularities of each surface and also its compound, so we can increase the amount of friction by those characteristics like tires for drifting or even decrease the rate by fluids and grease such as engine oils. If there was not any friction we even could not have a seat.
You are turning grey.
The world needs you Dr.Tyson
Can we have an explainer about what friction really is given that, at an atomic level, nothing actually touches anything else?
An idea of future episodes....
Can you take friction further and relate it to winter tires vs summer tires and slippery road? How the tire compound changes the level of friction and how the mass of the vehicle has a bearing on friction?
Would also like to see a comparison of re-entry techniques between the Space Shuttle tiles and the SpaceX powered re-entry on their reusable orbital rocket and their up and coming Mars mission with its belly flop landing.
These guys have the best energy together. I love NdGT's laugh. Plenty of provocative thought experiments, too. Brilliant explanations.
"You just thinking stuff to be true because it makes sense to you".....this makes sense to me
And so much more... stupidity results!
Just like dumba$$es who want to believe the earth is FLAT... 'cause it makes sense... to THEM!
Wonderful team. You both bring the knowledge and fun to our take advantage precious lifes.
Heating during atmospheric reentry is caused more so by the rapid compression of gas beneath the object, although there's some friction involved.
Also planes need less friction to take off. Imagine a plane of it's belly versus on wheels. Which one will have a harder time? But you need friction to help stop the plane.
12:20 It was Tim Robbins in Mission to Mars!
The first thing that came into my mind while reading the title for this video 😅
I would love an explainer video about how appliances like fridges, microwaves, ovens, etc. work. I get the general concept but I think it would make for an interesting video for all sorts of people
Technology Connections channel does in depth interesting "how they work" videos for all sorts of appliances and such! Great channel!
Is friction with the air required for flight? The example you have mentioned the ground but ground friction has no bearing on a plane taking off, it's driving force isn't from the wheels. A plane could remain in place with no ground friction until the requirements for lift are achieved with the atmosphere.
Please do one on shock waves.
Hello, I'm a big fan of what you do and I have a question, some say the earth is flat others say it's round, I say it's round, but let's say it was truly flat. this would mean that brazil's and Australia, and africa southern tips would be facing in different ways. And If I go to the southern point of all of them how do I see the same constillations, and how do you know we're south is.
I love these thought experiments. I do conduct many inside my head. Like if there were only two lanes in the world with no overtaking : incoming and outgoing, would we need a back mirror?
Professor Tyson, can you make explainer video about "sharpness" in atomic level. How does sharpness breaks the bonds between two elements of a material.
This is so insightful
Without Friction people could not have babies, lol 😂
Then without friction, humans would have been extinct and bored. Haha
😂😂😂😂😂
Meanwhile you have 69 likes now 😅
...and lubrication would not have been made or produced.
😂😂😂😂
Here’s a question I’ve had since childhood: when gears mesh with each other and one turns the other, is that friction, or some other force? Is a meshed gear somehow different from, for example, a soft rubber tire on a rough road?
When two gears mesh together, one tooth slides on the other tooth which generates point (because they are 3d shapes it would actually be a line rather than a point )pressure where they come into contact which does result in appearance of friction.
In the link provided below you can see that point move (green dot (line in 3d)) on the red line ( aka. line of action)
www.tec-science.com/wp-content/uploads/2018/11/en-involute-gear-meshing-line-of-action.mp4
In case of gears the actual transfer of power is achieved by shape, not friction.(Unlike eg. belt transmission which purely relies on friction to transfer the energy)
in case there was no friction in the world, if the housing where gears are mounted were not physically connected, they would move apart instead of gears turning
which is also why contact gear surfaces are made as smooth as possible and use sufficient lubrication in order to minimize the friction as it generates a lot of heat and all that energy lost in heat was not used in for example rotating the wheels of a car
Neil degrasse Tyson is a treasure trove of information I'm glad their are some people like him to share knowledge with us in a way that's easy to understand thanks to chick as well for being awesome
3:00 where does a Maglev train use friction? (Maglev -> Magnetic Levitation e.g. China Highspeed Train) (except for the Doors and emergency Breaks)
I need some frictionless conduit, it would make wire pulls so much easier.
Neil and Chuck ripping on Aristotle has made my month.
This is a good one. Thanks guys!
Chuck earning that paycheck with the Mr Miagi joke! 🤣
waxing lyrical.
Well Mr Miagi did the hand friction healing too...
That movie was Start trek the lastest version @12:12
Question please about the flexibility of the fabric of space-time: we understand, that gravity changes are propagated at the speed of light. That is: if the Sun were to suddenly disappear, our orbit wouldnt notice until 8 minutes later. Also it is assumed, that the fabric of space-time is fully flexible: able to assume any gravity at the speed of light as heavy matter passes through the tiny (planck like) fields that make up the 3D matrix of space-time. But what if these tiny units of fields are in fact not fully flexible: what if the presence of extreme gravity leaves it permanently scarred? As in a black hole changing its position, drifting, moving through space could leave a trail of scarred space-time fields behind which cant resume their original values they had before the black hole passed through anymore? Would we be able to ever detect (by lensing) such scars and could this phenomenon explain the effects we attribute to dark matter?
Thank you so much for your education and Chucks entertainment genious! Greatings from Hungary!
I think 11:40 is an interesting point. With friction on Earth, slowing down is "free", but maintaining constant speed must be paid for (fuel). In space, constant speed is free, but slowing down (ex: when approaching Mars) must be paid for.
NDT's helpless peals of laughter at Chuck's wise cracks makes this so much lighter and more fun
Keep these coming!
Sir,
@startalk Since, Friction has electromagnetic nature, then why we calculate friction force using Mass of the body and gravitational acceleration, instead of Electrodynamics Forces (Colombian force).
Great videos. Please also explain the Dzhanibekov effect in relation to earth’s flipping on its axis.
Plz make video on latest muon anamoly finded in Fermi lab
You should talk about static friction vs viscous friction. Mechanical engineers generally conceptualize friction in one of those two ways. The two kinds of friction are described by different sets of equations. But I'm sure that in The Real World, it's not quite that binary.
Yeah.
As an Industrial Mechanic. I appreciate friction. I love it when stuff comes apart, and hate it when stuff does not want to come apart. 🙃
I always wondered if enough cars all accelerated in the same direction if it could change earth’s rotation. Now I know! Love this show 😄😄
But where do you draw the line between friction and gravity ultimately? Feel like I am missing something.
I'd buy a StarTalk "Friction is your Friend" t-shirt in a heartbeat.
This all about friction makes sense but one thing,...I understand that friction favours the act of rolling....so, why is there something called ROLLING FRICTION??, I don't understand the mechanical premise of it....I'd be delighted if Neil Tyson eloberated this!!.....
would we slow/speed the earth rotation tho or do we just make that particular tectonic plate move ?
What about Starship? When it is coming down through the atmosphere and it falls with the most surface area downward to help slow it down. Is that not air friction? wouldn't that apply to anything coming through the atmosphere?
Reminds me of the frictionless starship in the parking lot of Douglas Adam's Restaurant at the End of the Universe. You wouldn't be able to even feel it, except as a resistance of forward motion.
..... Marvin parked it, ( Brain the size of a planet ).
@@robbieaussievic Inside a sun, no?
@@robbieaussievic I would love to see a suicidally depressed droid called MRV-N in some future Star Wars thing. Just have one character give him a sidelong double-take.
@@toyfreaks .... I was referring to the (1981) TV series, I haven't seen the remake or read the original novel.
I tried to watch the 2005 film only made it 6 minutes in, (My limited time on this planet requires selective viewing).
@@robbieaussievic I didn't even know there was a remake! My immediate reaction is "why would they do that?"
Sir Mix-a-Lot once said, "I'm long, and strong, and down to get the FRICTION on!!..." Who knew he was so into science!
I hope that’s not the only reason you stopped wearing silk shirts! 🤣🤣🤣 you guys rock! I love these explainers.
Interesting fact,the old steam trains had a small pipe that released sand onto the track just behind the mains wheels to give it traction/friction to stop the wheels spinning!
Sorry,in front of the wheels!
Just in time of sleep...thanks bud
I once did a calculation, I did the math. It turns out that Neil knows some interesting things.
Hi Neil, curious about your statement about mounting rocket rocket engines to speed/slow the earth. Would be interesting to know how much force it would take to slow the earth down over a year to slow the earth 1nanosecond per year, 1 microsec/milisec per year. Would be fun way to show how much force the moon exerts on the earth to affect the earth's rotation vs anything man can accomplish.
Hi, guys
I have been wondering about quantum fluctuatuons, and I know that the matter suddenly appers in a vacuum. I wonder if it is possible, that matter is somehow connected with the space, in the meaning that it can transfer in the same way that matter can become pure energy and opposite. Meybe when matter appers we are losing space(so little that we cannot even see it)? And when matter dissapears (during anihilation of matter and antimatter) , were getting more space and this way the universe expands. I would be gratefull to you Neil if you could answer this. Greetings from Poland.
Would have been nice if Neil had explained the difference between static and kinetic friction. (Static friction is the reason why the train doesn't start rolling right away when you pull it. Kinetic friction is the reason you require so much less effort to keep it rolling once it starts.)
if we ran due north would it change the axis in which it spins
Plane need friction for takeoff?
Nope...it throws back air to go forward...
Only for landing it needs friction...
.
.
.
.
(Although if wee look deeper... The mechanical parts inside plane need friction in some places) 😌
Wrong the wheels are on the ground during takeoff
Is friction limited only to solid surfaces? Might it be applicable to the acceleration of the universe?
Meanwhile, Your prof will spend a full class discussing friction and end up confusing students at the end!
My personal astrophysicist
But he said he's my personal astrophysicist
@@bonehead1534 he said he is mine....is he cheating on us :(
No he’s MY personal astrophysicist
Our personal afrophysicist
Now I don't know if I can believe him, like seriously what is the universe now if my astrophysicist is lying saying this false accusations, HES MY PERSONAL ASTROPHYSICIST😭
So if we put a refueling station on the moon, they can get rid of a good portion of the heat shields? thereby making the craft lighter on launch and re-entry?
Nice talk about friction needed to drive or walk. To listen to it in northern ICY countries :)))
7:10 Growing up we solved problems on why the turning radius of a car is higher for more slippery surfaces.
this needs more views
Neil, please do not equate WD-40 with lubrication, because it is not a lubricant in the traditional sense. It was developed as a water dispersal agent. Ergo the WD. The WD-40 company also owns and markets 3in1 oil, an excellent high quality lubricant. They didn't formulate the original 3in1, but now they own it because folks were trying to use their water dispersal formula #40 as a lubricant. No where on the label does WD-40 make any claim to be a lubricant.
But it is a lubricant?
Sandee Brooke Tucson Arizona, My Dad used friction tape instead of electrical tape. It was cloth tape.
All modes of transportation except rockets require friction
Do maglevs require friction?
In Larry Niven’s novel “Ringworld,” the ring is made of “scrith,” which is frictionless.
I think he's wrong about rockets not using friction. The stuff going out of the nozzle is pushing against the rest of the rocket, that's why there's forward motion. Also when he said that humans are not losing mass when moving, we do. Because we use energy when moving, therefore losing mass.
Every action has an equal and opposite reaction, so friction is not helpful in a rocket. Stand on a skateboard and throw a heavy ball away from you, as hard as you can. The same thing happens with a rocket.
@@ammelr Hands will have friction with the ball otherwise there is no way to throw the ball.
Also, the energy loss when using energy is absolutely tiny. You can rearrange Einstein's equation to be m = E/c^2. 2,000 kilocalories (recommended daily intake for an average person), divided by 300,000,000 meters per second, SQUARED, is 93 millionths of one milligram.
@@ammelr That's irrelevant, since the only reason you can walk is because you are converting that mass into energy. That mass loss is the source of the movement. Otherwise no movement. Also human is moving a very tiny mass, very slow compared to a 100.000 ton rocket at 10.000 kilometers an hour.
@@marble25 You need friction to hold on to the ball. Friction still exists in space between the rocket and its exhaust. But the reason the rocket goes forward is the exhaust going backward - not friction.
In which direction a vector of friction is pointed in a moving wheel?
I just watched the spaceX Starship 4th flight test and the re-entry... it was still glowing at 10km just b4 falling in the water...
It rode that friction allll the way down
I would have liked an explanation of how friction works at the microscopic atomic level
That's what I was hoping for too.
Anyone else super hyped to see the coming explainer on the muon experiments and possible FIFTH force of particle physics?
One of those friends you hate when you think about them, but you can't live without, when you don't think about them.
About time!!
I know this is not the same but If friction slows things down and Gravity slows things down, Where do you determine the difference?
Gravity is a force. Mass and friction are results of electromagnetism.
Oops. I forgot to preface my last comment, "If I'm not mistaken.."
So, Electromagnetism is also one of the Forces, unique from Gravity, if I'm not mistaken. Top of my head.
Could you explain centripetal and centrifugal force?
At 1:28 Chuck stifles a yawn! 🥱 Takes a breath and tries to blink it off !!! It's so hilarious 🤣 you're gonna watch it several times!!!
I really enjoyed this one
that's why we use bearings where we want to minimize friction...it there were no friction, we would have to come up with "opposite bearings"
Neil could've explained in a little more detail how friction affects a plane taking off, since that's probably not as obvious as the other examples at 02:45. He almost makes it sound like it depends on the friction between the tires and the runway somehow.
Don't planes also need friction to stay up? The air moving pass the wings has a longer distance to travel on one side than the other, and the friction of the air molecules on the longer top side of the wing creates an upwards force holding the plane up.
Every teenage boy knows that friction is his friend. Sometimes his only friend
Why do you have a bottle of lotion on your desk then?
If time and money were no issue, do we currently have the technology required to build a thruster large enough to turn a planet into a space ship? Or given our current technology would any structure that large be too unstable to construct