Wheel momentum Walter Lewin

This video is a part of a lecture from MIT open courseware. The teacher is Prof. Walter Lewin. He is Dutch origin astrophysicist. But at 1966 he went to MIT and stayed there.

[@MarcoBomben]

I'm a physicist and I really appreciated when he says: "None of this is intuitive". He is a great teacher also for statements like these

[@S2daUZ]

I liked that comment too

[@irokosalei5133]

Completely agree, that's what impressed me most

[@nelgreivnaj6116]

The end is the best part. He is correct. I did something similar the other day with a spinning wheel

[@TheNativeTwo]

When I was a physics student I struggled to overcome and ignore my intuition to come to the correct answer. Often it was just a matter of smashing together two equations I knew, but instead I messed the whole thing up following my intuition.

[@dongyoonkim6436]

I'm a physicist too and I agree.

[@jeetkukreja]

This is ten years back. And we still don't have classrooms like this.

[@zombiekiller7101]

It ahs evolved just backwards

[@cond.oriano3264]

This video looks like it was filmed far more than ten years ago

[@telracsazyl1243]

Cry

[@LegendaryGauntlet]

It's MIT. Get there and you'll get classrooms like this. Probably Harvard too.

[@lwo7736]

Yeah we do, my classroom is always full of stuff like this...

[@adn1785]

Physics classes like these are better than any magic show. Because this shit is actually real.

[@funkylentil6966]

Well magic is tricking you Crazy physics is just wowing you with things you wouldn't expect done by forces you don't understand. They're different things. But in a way, you can learn both physics and magic and wow people with both of them. Magic, you're just more involved. You have to do convincing slight-of-hand and things like that. ... I think they're both cool 😊

[@-Chicken_]

@Redfern Pitcher Magic = redirecting and manipulation in a sense that you couldn’t understand

[@DannySullivanMusic]

indeed. it truly is amazing

[@-Chicken_]

@Redfern Pitcher Yes I do I am god

[@BelVintage]

@@-Chicken_ All hail chicken

[@新月龍]

This is what a good teacher is like, showing students what they’re learning and how amazing it would be to predict its behavior with math.

[@Josemariaq977]

Las matemáticas no son tan buena prediciendo,gay un vídeo de eso

[@dushyantdahiya]

Honestly wish there were alot more physics teachers like this guy.

[@johngrey1074]

Physics teachers who sexually harass female students?

[@dumbrepellent-4327]

Yes, I understood.

[@HoaDucPham]

Guess some "fragile", "anxious" lit female decided to send her naked ass pic to an old prof, and then later claimed he sexually harassed her.

[@johngrey1074]

HoaDuc Pham No. He actually sent sexually explicit Tweets to his students. Good guess, though!

[@PineappleBaconPizza]

+HoaDuc Pham This happened to more than just one. Lewin is fucked and that's why he got the boot

[@glllll1279]

“Physics works and I’m still alive, see you Wednesday”

[@tyronenelson1349]

Gll Lll trying to fish for likes I see

[@seriall1337]

He should make that his catchphrase, ending every lecture with it.

[@dn1...]

Our lives not in hands of physics.

[@egy_fekete_volga755]

@@dn1... sometimes it is

[@DaFlashGuy7]

I guess they wish he were DEAD then, huh? haha! woo hoo substitute all year!

[@christopherhall5361]

2:16 the face of a man who loves his job

[@scottmcmaster4927]

Who wouldn't love being a knowledgeable wizard of the fundamental universal forces, AKA a Physicist.

[@nissangtr35x]

türk var mi:)

[@groszekkonserwowy6314]

@@nissangtr35x nie ma

[@neutronstar6779]

@@nissangtr35x ciddi misin 😐

[@nissangtr35x]

@@neutronstar6779 DJCKSKDJX

[@kennethbarber8696]

This man loves teaching. Students are hanging on every word. Seeing is remembering.

[@edithbannerman4]

@Hello there, how are you doing this blessed day?

[@pressstart1490]

This Happens when a teacher really loves his job, and not when only wants money

[@pressstart1490]

@kirwi Also

[@thjeu8539]

And when you don’t have to worry about the students breaking down your classroom 😂

[@preetsojitra8613]

Yes, teacher should be by choice not by chance

[@forresthopkinsa]

No one goes into teaching for the money lol

[@mikef5951]

@@forresthopkinsa Well, some do. The ones that really just want to do research pick up teaching as a side gig at the university theyre researching at to pickup some extra money, but beyond that youd be correct

[@tacianomm]

The world needs more professors and teachers with your passion and criativity, sir Lewin!

[@treepeenbawlz1934]

Amit kumar “metaphysician is sort of a Super scientist” wtf kind of bs is this? Who reads this trash? I didn’t know there was a “Super” level when classifying Scientists.

[@mihir6902]

Lol creativity

[@nischalthapa7007]

+dictionary 😂

[@MakeSushi1]

when he put the 2 kg on I was truly impressed

[@walterF205]

When you ride bike your wheels hold on equilibrium more than 2 kg. ;-)

[@ronaldderooij1774]

+Milano Walter Yes, and why that is, is still a bit of a science mystery. The Technical University of Delft showed that the angluar momentum of the wheels were by far not enough to explain why a bike does not fall over when no one is steering it at speed.

[@hadtomakeachannel]

+Ronald de Rooij It's because when you're on a bike and you start tipping, you steer into it to keep you upright. It's not gyroscopic effects, but it's not a mystery either, though it is quite complicated. the slight backwards tilt of the steering column also helps - really it's that what keeps the bike upright and rolling along even if you jump off, or you just give it a push and let go...

[@hadtomakeachannel]

+BLITZKRIEG 'it' may be 'unsolved' (for a given definition of 'unsolved'), but that doesn't change the fact that gyroscopic effects have almost nothing to do with it, and the stuff I mentioned have almost everything to do with it. Begone, mystery-monger! The power of Newton compels you!

[@chandranshpandey1929]

whats mystery in that its alredy in the books solved

[@romal6793]

Those students are so lucky to have a professor like him

[@kerijan2003]

This kind of teaching shouldn't be reserved for universities. They should have this in grade and high school.

[@dgurung3468]

Could not agree more .

[@lollerskates1992]

sadly not everyone is as intelligent, well supplied, and dedicated as Lewis.

[@thetrainman407]

More often than not, this type of hands on lecture is seldom taught even at a university level anymore. I have been to more passive lectures than I can count where you sit and listen to someone talk about equations and mathematics, simply just to hear themselves talk.

[@typicalgymrat22]

thetrainman407 Yeah but at least those sometimes use the board and what they say you can actually follow. The worst shit is when the lecturer is using some wall of text ppt which you have no chance of absolving and taking notes of. And has these extremely complicated drawings that when you go home, you have no idea what the mean. It's lazy and makes keeping up with the lecturer a fucking nightmare.

[@yigittosun4609]

this is mit bitch m. best on the world. you know better than best univercity in the world?

[@mousavi128]

"None of this is intuitive" I stopped feeling like an idiot when he said that

[@lakshminarasimhamurthyvish9204]

😁

[@marvvorin8172]

Pretty much describes my college experience... "None of this is intuitive, but i stopped feeling like an idiot"

[@kidandresu]

It is if you squeeze your brain a little. When the wheel spins fast the centrifugal force creates an inertia in all directions from the center of the wheel along the 2d plane outwards. That force have a direction along the plane and it will require a greater force to change its direction. That is, to tilt the imaginary 2d plane you would need a greater force than the one produced by the inertia. The 2 kg weight is not enough force to overcome the angular momentum of the spinning wheel.

[@pwnmeisterage]

But the effect actually is intuitive if you ever played with "toy" gyroscopes as a child, lol. You automatically understand what's happening. Even if you don't understand the math.

[@sircastle56]

He's right,it isn't...and this phenomena is important to ride a motorbike at high velocity

[@an2niotransitproductions813]

Everything is always theoretical. I like how this professor adds a touch of reality.

[@psychopath4156]

Hhseedc Crohn I'm fearful still snobby such winds welds Exxon

[@elouanp4588]

Physic is ALWAYS reality.

[@pablinmamani85]

In fact he teaches like the students are chilindrens without capacity to understand an abstract concept. So he needs show how it works.

[@DannySullivanMusic]

sometimes that's what's necessary

[@psychopath4156]

@@DannySullivanMusic EXACTLY

[@rkdosco]

I've shown all my young kids this video in preparation of bike riding, and had great success afterward, they quickly understand how speed is their friend to being stable on it. Thanks professor.

[@LootFragg]

Young Keanu Reeves: "This bicycle cannot go slower than 2 m/s!" Horrified bicycle rider: "Why? What happens if it goes slower?" Young Keanu Reeves: "... it will fall over and that hurts." **audience gasps**

[@linharen3689]

😄

[@philswaim392]

I love that he repeats "none of this is intuitive" Meaning that it took quite a bit of working out to arrive at the answers they have. Understanding the relationship of momentum and torque in that scenario took time and a lot of experimentation before someone could formulaically express what they were seeing and predict results using the formula he shows. To understand things takes more than being able to pattern match in your brain. You have to check the bias and patterns youre used to and challenge them to shake out what is right.

[@SSniperFly-lr7zb]

Big shout out to the folks at home who didnt know what intuitive meant.

[@filthyan1mal588]

@@SSniperFly-lr7zb I think it's more about how amazing it was to have been able to figure out these completely unnatural and bizzare concepts of energy and how things work and being able to show the math behind it. Even though at the time it's mind boggling. Kind of like when the world was discovered and proven to be round Pythagoras himself must have still felt perplexed by the idea, because the world he grew up in was always flat until the moment struck, and even then most of the world's "intuition" would have disagreed with him. It's not about the word intuitive so much as his acknowledgement of how truly difficult it would have been for these people to wrap their mind around a new concept that goes completely against everything they knew (so far). It was simply a nod to our predecessors in science and discovery, more than a spelling lesson. But hey sarcasm is always the funniest joke. Anyways physics works and I'm still alive.

[@sfgdragoon]

@@filthyan1mal588 on a serious note Pythagoras didnt discover the earth was round. Everyone knew it was so, it was more disproving that it was flat...

[@filthyan1mal588]

@@sfgdragoon you're assuming most people where smart enough to figure it out, think how smart you're average person is and remember 50% are dumber than that

[@sfgdragoon]

@@filthyan1mal588 no seriously, the earth was generally regarded as round. the flat earth movement even back then was a vocal minority, similar to today.

[@777Skeptic]

Why didn't my physics prof just play these videos and sit back and have a cigarette?

[@purewaterruler]

777Skeptic because cigarettes are bad for you.

[@ImportedFromSerbia]

B/c you dont pay 50 grands for year of study.😊

[@manishbisht6214]

777Skeptic good idea

[@BRESHEET]

Right!?😏

[@siddharth2796]

Ummmm tf

[@TheDrifterWithin]

GIVE THIS MAN HIS OWN TV SERIES!

[@BradenBest]

Walter Lewin's Science Brewin'

[@PsychRN84]

I am the one that spins the wheel.

[@BradenBest]

PsychoBrad84 _I am the one who spins!_ Fixed that for you

[@ChuckNorrisMr]

He is a physics prof. at MIT. Better than tv series.

[@BradenBest]

The Drifter Within Unfortunately, nobody would watch the show, as they would rather be watching _Honey Boo Boo_ and _Ice Road Truckers_.

[@cellocraze]

Everything made perfect sense until he went to the blackboard and I saw that formula.

[@SampadaaSapkota]

EXACTLY😂

[@Kaiizerr_]

Well it means the same thing. Formulas are lime abbreviations to simplify these things so they can be unified with other formulas. For example, Schrödinger’s cat is a very simple and famous paradox among scientists. There is a cat that is put in a box sealed with a vial of poison bound to expose and poison the cat at any given moment. The box is locked and not see through so unless you open the box you don’t know if the cat is dead or alive. So the cat is thought of as dead and alive. The formula for this experiment is \hat{H} \Psi=E \Psi. It is much shorter but I can not copy and paste the formula so just google it and you will see.

[@uddamkumarrr]

What a true comment!!

[@lorenzovergani6920]

None of this is intuitive. Doesn't matter you know maths or not.

[@matthewmcaleer5418]

I was thinking it and you said it!! 🙈

[@jebclang9403]

"None of this is intuitive" Truer words were never spoken

[@billbill6094]

"None of this is intuitive" and that's exactly why it's astounding to watch.

[@viveksinghchauhan7496]

A teaching based on experimental observations that's how classes should be like. I love the way he teaches. MIT and students were lucky to have him!

[@gvanderv-]

I immediately figured he must be Dutch due to his way of speaking. What an amazing professor, hope he can continue to teach and inspire ik whatever way possible for many more years 🙏🏻

[@izydizy4981]

2:17 he fucking loves to spin those wheels

[@myra961]

i actually laughed at his "pleased" reaction XD

[@VioletSky908]

+izy dizy I'm dying at his face LMFAO XD

[@alex1337bm]

+izy dizy LOL no ... He just invented a new electric-bicycle drive for the engine without a chain or a belt, but then thought about that tire destruction and that his invention is crap and he smiled, cause he laughed about himself :DDD

[@mystical2189]

I

[@ATrustInThrust]

There are many electric bike systems that work using friction wheels. They work fine....

[@soviet_genetics]

im no physics student oflr any other science person, but i could be watching his lectures for hours.

[@stephenwalker660]

+mantas kaupas beats sitting in a jail cell huh?

[@PaladinswordSaurfang]

+mantas kaupas Most physics professors do the occasional demonstration, which is usually entertaining, but 95% of lecture time is copying down a shitload of text and doing example questions.

[@irishdevil1490]

He is truly a great teacher, just doesn't teach it from a book and write it on a black board, he gives u excellent examples that teaches u more then any book could ...

[@hajtonprior6620]

TRUE LIKE TO 6'0 TALL AAMIIN

[@SamuelPearlman]

My high school physics teacher, Robert Barkovitz, taught with interactive/physical displays just like this! Which is why I became an engineer, and went to MIT :D Thank you, Mr. Barque!!

[@edithbannerman4]

@Hello there, how are you doing this blessed day?

[@liibaanrufaaci]

POV: you watched "when a physics teacher knows his stuff" first.

[@nithin1729s]

Yep

[@MrMarkguth]

So did I, bit hooked now

[@josefseibert3992]

How did you know?

[@gustavofring9148]

No this just came up in my recommended

[@imsonny_1]

Wait his do u know that.. Are u my FBI agent?

[@connie8309]

Never thought physics classes could be this fun.

[@MTLTV-eu4nv]

My high school physics teacher used to say “Physics is phun” (yes, the F in fun was replaced with PH). It was at the top of every worksheet he created for the class.

[@Lefty93]

Then you should absolutely watch Andrew Szydlo's videos !

[@CHEEKYMONKEY1618]

This is the level of passion about a subject every teacher should be 💯

[@johnnychinstrap]

I never understood angular momentum in University. I could see everything in physics except that. And then HE made the statement the angular momentum chases the torque. Such a brilliant way to tie into linear dynamics. So cool. I can now see the force acting on the momentum in spin. I wish I had him for undergrad physics.

[@edithbannerman4]

@Hello there, how are you doing this blessed day?

[@johnnychinstrap]

@@edithbannerman4 Wonderful Edith. Thank you for asking. Off to the gym. Hope you are too! God Bless! Cheers

[@johnnychinstrap]

Not hope you are off to the gym. Hope you are having a great day too... LOL

[@edithbannerman4]

@@johnnychinstrap Yeah where you located?

[@edithbannerman4]

@@johnnychinstrap now living in Ohio. What’re you up to?

[@jhanthony2]

This reminds me of my physics 101 class at Michigan State in 1974. The classroom was virtually identical to this lecture auditorium. The professor had a student stand on a lazy susan type of platform and hold the bike wheel while she (professor) used a power drill to wind the wheel up to a truly frightening speed. I was worried the wheel was going to grab the student's shirt and end up killing the kid. The professor told the student to twist the axle to see what would happen. We all knew that this would make the student rotate on the lazy susan platform. However, the student gave the wheel an excessively strong twist and found the forces too strong to control. The wheel jerked from his hand and he ended up barely maintaining balance on one foot in an extremely twisted posture while holding the uncontrolable, madly spinning wheel in one hand above his head. Eventually, the wheel twisted out of his hand, landed on the desk, let out a squeel of spinning rubber and took off up the audtorium. Every time it landed on a desk, papers and notebooks would go flying as paniced students were diving out of the way. Best physics lesson ever.

[@kaanbostanc9032]

holy moly

[@kistuszek]

+jhanthony2 That demo would worth gold if you had a recording of it.I was laughing just reading. :)

[@michaellieberman114]

lol

[@ttaibe]

I suspect the professor never did it quite that way again XD

[@mkaali]

People say the wheel is still spinning around empty halls of MSU

[@BRESHEET]

I love teachers like this; they make things soo interesting, so you'd always remember what's taught.

[@freeszore7526]

My mom walked in i switched to porn cause it was easier to explain..

[@KingHelmer]

+Freeszore What an original comment that i never saw in the entire internet before! Good jokes mate real funny See you at FUCK YOUJ. Kappa

[@JaySay]

+King Helmer Good job. I'm proud of that kappa

[@Nomnomnomiana]

+Freeszore HAAAAA

[@XDreamFallacy]

+King Helmer Tbh in this context this comment is actually good.

[@benrider6552]

you have a degenerate family

[@vssp6623]

This will make anyone less afraid of banking on a motorcycle.

[@thatguynamedgeorge9218]

When you go into your first day of the class, and see an industrial motor on the teachers desk, you know you are going to have an interesting day.

[@wellesmorgado4797]

In the 90s at MIT, they used to do the experiment of shooting a bullet into a suspended woodblock, to see how much the block would swing, and thus calculate the bullet's velocity. With a real bullet shot from a real gun!! All done very safely of course. I don't know if that still happens to this day, but that was an amazing class.

[@TheAsdsdswww]

keeping your fingers close to those spokes while the wheel is turning fast is real love for physics

[@medievalogic]

there is something magical about people who are passionate about their work, unlike 99% of the test who are just plain robots with 0 ingenuity

[@arshakmartirosyan4217]

,P9⁹

[@suarsuar747]

Ya man

[@shivamdhumal5864]

I think I know you sujal

[@jyothikarnavar]

I will listen to him 24*7. What a great teacher ❤

[@jasemgee]

This bug will be fixed in IRL 1.10. Thank you for reporting. God

[@TheTekvicka]

Mkay

[@aishafarooq3778]

What is IRL by the way?

[@paulyder521]

@@aishafarooq3778 in real life, our server :0

[@Voicist]

Signs that indicate a professor is genuinely nutty: Hangs wheel lmmediately forgets where wheel is

[@sultanhanga]

Dont trust physcis

[@anavioniclynx8338]

watch the chalkboard after he hangs it up and after he finds it again, he stopped and wrote a bunch of equations on the board after hanging the wheel

[@Kube_Dog]

How could a genius professor leave ".wmv" in his video title? And why isn't he using .mp4?

[@kevinhellalong7838]

@@sultanhanga What should be trusted then?

[@sultanhanga]

@@kevinhellalong7838 art

[@ercancetinkaya9635]

My dear dad said for many years : to teach somebody something, don't say anything but show it..Thanks mr Walter Lewin

[@Orangelemonblue]

How he says ”none of this is intuitive " reminds me so much of my university phyisics II professor when discussing electromagnetism with us...one of the best classes I ever took...God bless professors like both of them

[@tmltherapeuticfarm7511]

nice, he really knows his stuffs and really makes the numbers "speak" for themselves. this is the way the teaching of science should be like

[@gulpbiys5705]

kzbin.info/www/bejne/qZOmgpeXoaxlea8 ,

[@davidcoleman2868]

I don't understand a thing of it. But I love every minute of it.

[@rayoljulio]

"none of this is intuitive.." best quote ever about my loving relationships

[@zakizakou4776]

What does he mean?

[@polhdz]

@@zakizakou4776 Exactly

[@RealPi]

I did pure maths, so for me there were no experiments. However, it's all about getting vivid examples for people to remember. And a great lecturer was professor Ian Stewart (Warwick University - he worked with Terry Pratchett). He was my supervisor during my masters and an amazing guy. Truly incredible lecturers like this make it all worth it. He would give us hundreds of examples when studying fractional dimensions and such (topology for dynamical systems and chaos theory). He made the hardest thing easy to comprehend.

[@harihararamesh1375]

My Salutes Sri Walter Lewin.. Indeed I his student.., as this kind of Mechanics demo mingle to theoretical calculation made me bright Sir.. Superb.👌

[@dirkvanhalst2563]

I wanna go to school because of this man....

[@lidocaine8921]

That's a pretty unmistakable Dutch accent....lol

[@sidar87]

Non of this intuitive.

[@Strange_Life0]

Li Docaine i've noticed yea :D but is he from the nederlands?

[@lidocaine8921]

MrXpkiller yes he is, I watched him on an older episode of a Dutch show. He's very Dutch indeed 😉

[@Strange_Life0]

ow haha thx i like how he act its so much fun

[@pusheenthecat9264]

a physics teacher that can turn a boring equation into a cool magic trick is very rare. This professor is amazing!

[@csdcsdc8928]

God dammit i want a teacher like him dude ...rotational dynamics here in india is taught so badly u...I learnt a lot from this small video

[@durgasumesh5263]

Tell me about it, I'm trying to like physics but ooof, ncert sucks man

[@csdcsdc8928]

@@durgasumesh5263 exactly dude in which class ru

[@IPassedC1German]

Same here

[@durgasumesh5263]

@@csdcsdc8928 11th now over to 12, same as u ig

[@fabspark1631]

Try unacademy jee live daily....

[@MissySimpleM]

His lectures are so great. Things that are hard to grasp are a bit easier the way he says them.

[@rusdyparinduri6925]

I am kind of students who doesn't get the subject so easily with just a theory, a practical example like will change a lot my perception of school life back then

[@stephenainsworth1803]

Physics is amazing when demonstrated in such a straight forward way.

[@Yestlbeexact]

ppl who didnt watched this: missed out ppl who did watch this: satisfying

[@atwunz]

1:23 Nobody: Students: Teacher: Isn't that amazing? Students:

[@brawldude2656]

This what i call interactive lesson. All students needs that!

[@SeniorMoostacho]

You are the Best Teacher ever. IMHO.... You have taught me so much from your videos about things I never knew and was always interested in. 👏👏👏👏👏👏👏👏

[@appuvaz]

"None of it is intuitive" But it is closest to it when he explains it

[@zakizakou4776]

What does he mean?

[@aliokatan]

@@zakizakou4776 He means it doesn't easily make sense, our minds cant really think about it easily unless we try hard

[@zakizakou4776]

@@aliokatan thank you very much for your answer

[@hikaru_e]

In lectures in our university we are supposed to imagine all these stuff with no live action which is really hard sometimes, just signes and things going here and there, it's a bit demotivating.

[@AMM_AMM_AMM]

This comment fits with ur pfp so badly...

[@vichy7661]

Simo Ritto unless professors also have esp (mind reading capabilities) no one can understand your thoughts or imagination either right or wrong. Imagination is important, also hands on practicality.

[@sanjeevsen849]

Wow thats the physics and engineering should be taught

[@reminanashi08]

How I wish our professors would teach us like this in the university. It's easier to learn when lessons are demonstrated like this than just discussing the lecture. It makes it more interactive which makes it memorable and easily understood.

[@haaibaai2387]

haha students, wasn't thst great?!! now gimme a 20.000 word report fgfts

[@MicroageHD]

Words are easy, equations are the problem. (k, dis is still easy but later)

[@hardyhazramy6761]

That is 20 my sir..

[@passenger6619]

@Hingle McCringleberry one of the best and classic comment I have every seen.....true tho

[@sashafalcon6407]

@@MicroageHD For some people is the other way around.

[@PaladinswordSaurfang]

0:35 Did he literally just forget where the wheel was?

[@hindsight8522]

He might have some memory problem but at least he knows a thing or two about physics

[@911shan]

The lecture is cut. I bet he hanged the wheel then explained in theory how everything worked before physically showing it in an experiment. Therefore, not unlikely he forgot where the wheel was.

[@samuroma700]

It happens when you are talking about deep discipline, and thinking to a lot of stuff. Anyway, when he forget where the wheel was, it passed some time, cause you can see the video was cutted

[@TheDisarminghinkle]

It's literally in the most unlikely place imaginable.

[@Mono_Autophobic]

@Alexandru exactly I donno know why people are so silly

[@faivrejean-michel8744]

The most important part in physics as humans, it's the emotion we can read on his face at 2:16

[@engineeringsimulation4921]

I loved the explanation of angular movement, and above all seeing the general idea of ​​the explanation of movement in torque, since in Newtonian physics or mechanics it is extremely important to always explain from the why, and the what for of the things themselves, incredible teacher

[@nickevanson9585]

I was trying to demonstrate this to my class and as I was spinning the wheel my finger got caught in the spokes and it chopped off my finger and blood was spewing out everywhere.

[@JustinLaNoue]

Nick Evanson Must have cut off your comma finger...

[@peter1234511]

Oh my God.

[@patrickellis1151]

Lol quit lying Evan

[@scuro8847]

Nick Evanson Are you joking or being serious?

[@patrickellis1151]

Well now that I think about it, this guy could have actually cut his finger off with a tire, because my friend had his finger cut off by a ladder. So if the ladder can do it a tire spinning fastly probably could too. BUT, if you go to his profile, you can clearly see a fishing picture with all his fingers intact. Whos to say the pic wasnt before the loss of finger. We may never know lol

[@shyaaaau]

Who is here after 10 years😌😌

[@cyb.x]

me 😂

[@swagatbehera1591]

Me

[@Dekko-chan]

“The dutch accent is feared even by the dutch”

[@PoppaMubaaba]

This is 12 years back. And we still don't have classrooms like this.

[@rakeshpujari]

KZbin recommend me after 10 years ❤️😜

[@nsignific]

"none of this is intuitive" I just love this last thing he says, there.

[@mrjoker2602]

they study this in university but in india we study everything in jee in 11 and 12

[@bluemass3834]

Yeah and you come here to do further studies and job. So, jokes on you

[@Bayo106]

@@bluemass3834 jokes not on them. that's why they are so smart....

[@tonybrowneyed8277]

in france in the 70's, if you wanted to go to the university to study literature, you had to understand how to calculate air resistance via integration for a falling object, among other things they did, in order to prepare for the Bac (their SAT). these days there is a general tendency in the west to easy up the way through school for the students...

[@ironjohn5914]

He ended up building a time machine out of a DeLorean and went back to 1985 to explore the times past.

[@swastikbiswas8293]

"None of these is intuitive" Yet your experiments give me that

[@thehanz123]

Any person who thinks they can understand this in highschool from a scholar standpoint is underestimating the complexity of physics. It's not just plugging in equations and getting answers, it's Hard Earned Knowledge that takes hours and hours of analyzing and conceptualizing.

[@LighterNumber300]

Years.. Sometimes..

[@thehanz123]

LighterNumber300 yes

[@nmarbletoe8210]

Balance and lots of hands on experimentation !

[@fartingjizz13]

+Balance Or very good mathematical understanding on top of intuition. Source: I have a BS in physics. Edit: But yes, you need to take your time to conceptualize why things explained in textbooks or by professors are suppose to make sense instead of taking it for granted. However, that shouldn't take you years and only hours and maybe days (well, that's from personal experience, but quantum mechanics was a bitch).

[@stevencoardvenice]

I took physics in 11th grade 20 years ago and learned the formula, but I don't get it

[@arunatripathiarvind4747]

Bruh why is this random teacher risking its life every lecture and why is he so underrated

[@rithu2528]

Nobody: Indian teacher: page number 240 to 290 . Class over

[@black98rt]

I was guessing the wheel would slowly fall over in a second or two. My mind is still F’d that it didn’t.

[@SathvickSatish]

black98rt because it’s spinning way faster than we think.

[@tamannarmaurya]

Physics Walllah Sir is best ever♥️

[@kanutomer8102]

he was in a sexual harassment case because of which he got fired from MIT so I don't think he is the best Physics teacher

[@immortaluck]

No doubt he's one of the best physics teacher, a mistake can never define someone's character and also no one can deny he worked really hard to make things easily understandable

[@ericastier1646]

This is the same couple that keeps a spinning top (toupie) from falling while it's rotating. The second half of his experiment is much more difficult to comprehend ; the added weight increases the couple that is trying to topple the spinning wheel which the latter counters with more precession angle that causes the faster rotations, just like a spinning top starts making bigger circles on the ground when it is loosing momentum and just before it topples it is drawing fast circles in the air with its top.

[@etcetera3282]

If any of my physics teachers taught me in this way in high school, I would not have such a dislike for physics now. But they had no electricity or the facilities to conduct any kind of experiment. So, I guess I've to forgive them. 😳😳☺🤩

[@AsadKhan-ft4ce]

boy i wish to attend a class like this so bad.

[@bprajeesh2759]

This is what Indian education should learn first, simply learning theoretical by heart, and companies are selecting by looking the percentage

[@rohitghosh5091]

Yeahh all that mug up during preparation and vomit in exams stuff in India

[@user-muser.10]

Ab smj ma aya ye video kyu recommend kia utube ne,,,, MIT is really amazing inst.

[@pierrebortin350]

Talk english

[@bprajeesh2759]

@@pierrebortin350 first you talk in our language, after that I will

[@xamanrivas7192]

So much respect for his passion...giving it all on an everyday class. Mention his name...many will be proud.

[@островсокровищ-р9ь]

Были бы у нас такие учителя, никто бы и школу не прогуливал! 👍

[@Юнус7777]

Инквизиция по нему плачет ,он же колдун)))

[@островсокровищ-р9ь]

@@Юнус7777 😂

[@intheanimalworld3722]

ОК, ютуб, я посмотрел ролик, который ты мне так навязчиво рекомендовал. Доволен?

[@ВикторНаумов-л7ш]

Вот так нужно преподавать физику!!!

[@crfractures3395]

at 2:16 you can clearly see the Professor LOVES teaching physics...shame there isn't many teachers like this left

[@taylorhurst1499]

I'm glad he said that it's not intuitive knowledge, because this shit makes me feel dumb.

[@robstoltz9752]

Back when you could spin a bike tire in public class and not offend somebody..

[@domestinger8805]

That's racist. Everyone can ride a bike

[@kreyvegas1]

What do physicists mean when they say something is not intuitive?

[@marannebbeling9799]

While it is obviously something that can be proven, it isn't something that one would predict to happen when one only uses his common sense.

[@kreyvegas1]

Maran Nebbeling Thanks

[@SebDice]

Maran Nebbeling great answer, i was about to ask the same.

[@sigalig]

If you want the best example of physics that is not intuitive, check out special relativity X)

[@bernatbosch]

Actually it means is not obvious to our senses... but we need logic and mathematics to understand what happens

[@djanomg2934]

I would learn very much from this teacher cause it's more interesting that he shows it while explaining than teachers that just explains

[@eto927]

Wish I had this teacher back then, I would of done better in life.👍

[@Zehradieux]

The 'would of' really adds to it.

[@iiLoveAutumn]

2:17 dude was feelin' it😂

[@RizwanKhan_99]

where was this guy when i was in grade school?

[@haripriyamahadwar1778]

On the KZbin

[@francescoallegra5324]

Cool. Basically when he put the 2kg mass hanging in the center of the spinning wheel it does not affect the moment of inertia of the spinning wheel ( as the 2kg mass stays in the center of the wheel) but increases the torque which now has 2kg more mass that want to flip down the spinning wheel. And results are that the spinning wheel and its angular momentum L remain the same but the torque is now greater. So the pulsation of the system omega_pulse= Torque/L is now greater. And we can see that the Angular momentum is chasing the torque faster, which means that the whole system is turning around faster ( while spinning angular velocity of the wheel and angular momentum remains constant).

[@nitinagrawal3184]

Doesn't know why you tube recommend it after watching kota factory 🤔🤔