@@DaVdWatsonShe did something very impressive and was the first person to earn a double Nobel award. She found radioactivity but due to large exposure to X-rays, well... She died much earlier than eotherwise
I was gonna say it's not really anything special, and that I remember a teacher doing something almost exactly the same when I was in middle school. And then I realized I remember almost nothing about middle school, but I do remember the teacher doing this experiment and the basic principles behind it. So I guess you got a point.
There was once an engineering professor who would throw himself at the safety glass windows in a very tall building to demonstrate that it won't crack or shatter because it's specially designed to withstand much more significant forces. This worked every time but once. The pane of glass remained perfectly intact but popped from its case.
@@lecturesbywalterlewin.they9259it's interesting to see you still active on UA-cam and replying to some comments.. After I've seen this video once before, every time I think about GPE, pendulum or see in the class, I remember this representation I like physics so this is very much my kind of a topic Edit: just checked and I can see you are almost daily uploading, that's very cool!
I’m not even interested in physics beyond mere curiosity and yet this man’s enthusiasm is absolutely infectious. What I would give to learn about something from someone with such a love instead of a teacher who very clearly wants to be anywhere but a classroom.
Your mind which has evolved to be human and work in logic understands conservation of energy and that the ball has to stop. But the monkey part of your brain that evolved to throw rocks at tigers sees a big rock moving damn fast and expects a crushed tiger.
that physics teacher was a good teacher he clearly explained that when he released the ball the gravitational potential energy converts to kinetic energy as it swings down.
If you're interested in the proof: Energy is conserved in this system.. Therefore, E initial = E final. Using this, we can use the formula for kinetic translational energy K = 0.5(m)(v)^2 and set it equal to mgH (gravitational potential formula). H is the initial starting height. You can simplify this by canceling out m and g constants from both aides since they do not change. We are left with H = 0.5(v)^2 Therefore, v(velocity)will change based on the height but will never exceed the total output of gravitational potential energy.
@@JustapErson well they learn it in primary school too. It's just for some reason, American schools like to go over the same thing over and over again. Why do other people hate Americans? Yall find every way to hate on them
@@JustapErson You learn the basics of the basics of the basics in Primary School. Primary School= Shit goes up and falls down. Highschool= How fast and why it falls down. College= Yeah but let's see outside of our scope of understanding how shit falls down. That how college work.
This video pops into my feed every so often, and I always feel the need to watch it again. For some reason I also never forget it. It was great teaching
I watched his physics lecture series back in 2008 when I worked in restaurants to save up for university. Over a decade later, I'm now a senior engineer in a multinational consultancy. Thanks for the inspiration and wisdom!!
Demonstrations and hands-on learning are important, but I feel like this professor's passion, sense of humor, and clarity are what make his method successful. Professors with that kind of energy really make classes enjoyable and get students excited about the topic. Putting one's life on the line is just the icing on the cake lol.
The passion isn't gone, teachers are told to teach certain things certain ways. Students have much lower attention spans/self-control/respect and aren't taught consequences. Lack of good parenting and schools/parents/students not seeing teachers as professionals or even human sometimes.
@@metalbabee As a teacher myself who has been going through a rough week because of a parent complaining about me to my supervisor and coordinator because her daughter got a 98 instead of a perfect 100 on her overall score, and my superiors lecturing me on how I should be doing better because they can't ever so no to parents, I can't tell you how much it relieves me to know that there are people out there who understand that teachers aren't these soul-sucking vindictive monsters who purposefully want to take the joy out of learning. Just like you said, it's the school, parents, and yes sometimes the students who make it hard for us to go into work everyday smiling and trying to do the best we can when we know we'll never get any thanks for it.
@@Neonarmenian I received such a shock when I first started teaching, seeing the way things were actually run in schools - it took me over two years to accept the fact that schools these days are less about teaching (or helping teachers teach effectively) and more about business. Hard to feel passionate when you are given a thousand pointless tasks and deadlines to meet instead of having the freedom to teach the way you want that's best for you and your students.
@@00ammy00 ngl I feel bad for some teachers cus in my class we complain about the mean teacher who tells us to be quiet when we talk but then when it's a nice teacher who only shouts when it goes too far they take advantage of them
I've appreciated learning more with professors demonstrating practical applications of what they are teaching. I carried that over when I was the one teaching.
i took physics my junior year, passed with a 70 forgot everything, yet somehow the way this dude just taught this it made everything flood my mind again i was literally finishing the dudes sentences for him, i wish all my teachers could be this easy to follow
How we learn is very important. The difference between a great and engaging teacher and a teacher just goin through the motions can drastically impact how much the students learn.
My physics professor was like this guy, he was hilarious and always made this homework and test questions from various movie or tv show scenes and why the would or would not work. Back to the Future was his favorite movie since they just made up a unit of energy and rolled with it rather than trying to make it all “sorta” reality. But he also did pop quizzes over Back to the Future physics to make sure we watched his favorite movie
@@mujtaba9190 If it was the tiniest force, he wouldn't have died, but experience anything from gentle contact with his chin, to a broken chin, jaw and teeth.
Explain to me how you could do anything like this when learning 95% of the topics you learn in a physics degree. You need to learn from a textbook. It is the best way to learn. Most of the time, it is the only way to learn. Don't believe that 'you just forget it after the exam' bs either - it's not about your capacity to remember, it's about your capacity to have been able to learn it.
@@Michael-mh2tw I'm unsure what you're trying to say. Are you suggesting that lectures don't add anything? In my college classes, the quality and coherence of the professor was instrumental to my understanding of the material. Reading the textbook is one way to learn, but even though I like reading, math and physics textbooks are very dry, and my eyes tend to glaze over. It doesn't make sense to me unless someone walks me through it, preferably while drawing diagrams or graphs on a whiteboard. Taking notes is crucial. I was homeschooled in high school, and math was one subject where I fell behind, since I had no teacher and was just attempting to absorb information from textbooks. At community college I took an algebra course online where the professor was barely even existent, and I got a B (I had to watch Khan Academy videos on the side to pass). When I went to a university, my Trigonometry and Calculus teachers were very good, and I got an A in both classes. My physics professor was hard to understand, and I got a B (I really should have gotten a C, but he was a lenient grader).
I *was* lucky enough to have a physics teacher like this in high school. Energetic and enthusiastic about learning, he'd be leaping onto the top of his desk and shouting "Come on, people! Physics is FUN!" if we weren't as excited as he was about his lessons. Thanks Mr Thorpe. More than 30 years later, still the best teacher I ever had.
Man I love your style. I threw a balloon into a fan the other day and it blew my mind when I learned (to a degree) what made it stay there. Now I’m teaching myself math to maybe go somewhere in that direction.
'' This man risked his life for PHYSICS '' You’re probably the best physics teacher out there. There should always be a way to learn something new in a fun way! ✨
@@snoop_diggity_dogg6059 if someone at the other end released the ball higher than that man’s height instead of releasing it in-front of himself like he did in the video then that ball would’ve obliterated his head. That’s what he was trying to explain, that you can’t make an object swing higher at the second point than the first point because that would be more energy than it was actually given
watching this years later and understanding every concept and formula is crazy to me, I'm glad he does visual examples I wish more physics teachers were like this instead of just doing a bunch of notes and then word problems
@@lecturesbywalterlewin.they9259 Hello sir, I'm a student of 10th grade and I'm in love with your lectures, so much so that I can't stop watching advanced concepts. I can't believe I'm able to understand college level topics while being in highschool ❤❤
@@lecturesbywalterlewin.they9259 "...and most things are beautiful" .. Sir, I'm inspired. The way I see things is so simple, the fact I'm walking and standing on this land. But physics really is the study of everything we see and feel. Why wouldn't you want to know more about it? Wow :)
We NEED more teachers like this. It makes the students actually WANT to learn. Instead of just making them stare at a piece of paper to remember things then forget them after their finals, it makes them want to learn about the topic, as what he did here was actually interesting.
@@Nooop655 wait till you find out others can influence your decision. If the teacher is shit ur not going to want to learn what he teaches but if its a good teacher its going to be your fav thing in school
Thank you so much! I am in 8th grade right now and doing a science project. All of this information is really helping me put together a strong thesis for how pendulums can best simulate perpetual motion!
I had a physics teacher similar to this my junior year. He always presented everything we were learning in a tangible way with real application. Looking back it was my favorite course.
Had one similar like 20 years ago, when he brought out the Van de Graaff I had the longest hair so knew I was up. He burst out laughing (and knew it was coming) after I stepped off the box and grounded my leg... Probably my favourite too TBH.
I have never forgiven UA-cam for introducing that endscreen feature. I don't know how many years it's been and I don't care, I loathe and detest that thing and will continue doing so as long as it exists.
I am a jee aspirant (from India 🇮🇳🇮🇳) and I want a teacher of physics like you ❤ you gave me the feel of concept ❤😊. I am watching this video after 8 years
The risk was negligible. The biggest risk was him flinching into the ball. That is why he closed his eyes. I've done this experiment. It is very very difficult to not flinch.
Yeah imagine if the panel holding the object dislodged a little bit, sudden tremor/earthquake, badly managed cable, etc. Kudos to the guy though but nope! 😂
lol, I was gonna comment saying "All this science and still alive - makes me want to play Portal!" but decided to check the comments first. Ah well, guess I'll just have some cake.
This next test applies the principles of momentum to movement through portals. If the laws of physics no longer apply in the future... *God bless you.*
I absolutely love the squeal that is heard at the end of the presentation!!! Usually it’s a bit embarrassing and frowned upon to make noise during a teachers lecture, but it goes to show the true engagement you have made with your example of physics!! She just couldn’t help but make an anxious noise as you put your body on the line, and the whole room erupts with laughter because of it! Truly a presentation they will never forget, and from that, you’ve made an amazing difference in the world by making us smarter. ❤
This professor thought he was teaching a room full of students.... Naw this guy is teaching 41 million people, people still watching his lesson today..... Absolute legend.. we need more men and women like this teacher teaching the world for generations.. not just the youth but everyone
@@alexperez3367 its not just for attention, its to demonstrate a real world example so that the students understand that what hes saying isnt just boring, but it can actually be really interesting and maybe prevent people from dying
I watch 5 year ago. This is the video that made me passionate about physics (one of the most difficult subjects) and from there I passed university thanks to physics, it pulled me through all other subjects. respect forever
We had a physics professor who got around with the use of the old style crutches that have cuffs that clip to your wrists. He once did a demonstration on inertia where he carefully climbed onto a wheeled platform and then by shifting his body weight, could make the platform move. Problem: The floor in the lecture hall was not level and he ended up rolling out the door and into the hallway. I suspect he knew this would happen and did it for comedic effect, but it was still hilarious.
There was once an engineering professor who would throw himself at the safety glass windows in a very tall building to demonstrate that it won't crack or shatter because it's specially designed to withstand much more significant forces. This worked every time but once. The pane of glass remained perfectly intact but popped out of its case.
I bow down before courage and determination of this person in what he does and before his extreme devotion to his work! I know perfectly well that if I'd have such teacher from Physics in my school, probably I'd be a well-known scientist by now. God Bless You, Dear Teacher! And please, do take care of yourself and of your health, for such teachers like you are very necessary nowadays! 🙏🏻🌟🌟🌟🌟🌟
You shouldn't skip a single class in the first place since you paid for it and your goal is to pass all of your courses. Why would you even care if your professor is boring or not, you go to class, learn the objectives, study, pass exams, get the degree. Very straight forward
@@tam6493 I mostly agree with you, except for one little detail. When I was in college, I met quite a few of really useless professors. They talk, they show slides, they give homework. However, I knew this stuff will not get me ready for the exam, because what they teach in class is only 10% of the whole material. You can bombard them with emails, catch before the class, book the office hours, but it will work not always. If the professor is _determined_ not to work, he will continue feed you single-worded answers, like "it's all online", or "ask your peers", etc. I skipped classes deliberately when I knew I am not advancing anywhere by attending them. Instead of focusing on something I can read myself faster, I will better sleep or cover more stuff in a book. In most cases, my grades went up because of skipping a class. You don't pay only for the class. You pay for credits, exams, homework, and finally, the diploma itself. _But_ _that's_ _a_ _completely_ _different_ _story._
@@tam6493 Not quite. You don't have to attend every class to get good grades. In many classes, reading the material on your own works just fine. Let's not pretend every class is quantum mechanics. That "you paid to be here" argument doesn't work tbh. If you can get the grade and knowledge you want while not showing up, you're not wasting money. I know some professors want to think their class is the most important thing in the universe, but many courses don't require much effort to do well in. It's not the student's fault if a class isn't particularly demanding. I even think attendance policies are dumb(in university). If a student can do well in a class while only showing up occasionally, why should they be punished?
Even if it had touched him, almost all kinetic energy would have returned to potential by the time it did, therefore not passing on much in the way of pain.
Finally a teacher who makes class entertaining, I've watched the whole thing without even looking away, There are still some amazing teachers in the world.
@@venugopalan6902I agree it is a bit weird to expect that, that’s why instead my physics teacher made us do that, he’s call us up and ask us if we believed in the conservation of momentum and tried to see if we would flinch, he’s awesome
Teacher: This could kill me
Audience: Laughs
Teacher : this killed me
Audience : laughs
Teacher: gets his chin crushed because he failed to give it 0 speed
Audience: Laughs
Teacher : Physics works, and I am still alive.
Audience : *cries*
💀💀💀
Teacher: This could kill me
Cringe UA-camrs: Respect 💯
"Physics works and I'm still alive"
~true words by a legend
Marie Curie: Physics works and I am dead.
@@DaVdWatson😭..
@@DaVdWatson Well, we Poles have experience in being under partition, not in staying alive 😅
@@DaVdWatsonShe did something very impressive and was the first person to earn a double Nobel award. She found radioactivity but due to large exposure to X-rays, well... She died much earlier than eotherwise
Butt.....plug
2:06
The two guys who got stoned but showed up for class and were glad they did.
Lmfao. Bro looks stuck 😂😂
lolz
naw bro that's just a foreign exchange student
Bro was flabbergasted
He’s just Chinese
"I am going to put my life on the line" Mr. Walter says.
*entire class cheering*💀💀💀
mr white?
@@axlrosest this is the moment Walter became mechanical energy
Kudos to this man for going out of his way to present something that his students will remember for the rest of their lives.
I was gonna say it's not really anything special, and that I remember a teacher doing something almost exactly the same when I was in middle school.
And then I realized I remember almost nothing about middle school, but I do remember the teacher doing this experiment and the basic principles behind it.
So I guess you got a point.
Facts I don’t even remember who taught me how to count but I’ll remember this
Ao3
They'll forget it by the end of class.
@@weneedaladder8384 im a middle schooler and my teacher just did this thing like today
“Physics works, and I’m still alive!” This is the second time I’ve watched this video and I love it. That professor has balls.
Literally! One almost crushed him. 😃😃😃
@@bushbasher85 tmi dude 🤦🏻♀️
There was once an engineering professor who would throw himself at the safety glass windows in a very tall building to demonstrate that it won't crack or shatter because it's specially designed to withstand much more significant forces. This worked every time but once. The pane of glass remained perfectly intact but popped from its case.
@@emmiluuv7700 how tf is that a tmi
Religious people making false predictions: Is it possible to learn this power?
I just love these types of teachers 😊they truly go above and beyond to make a routine lecture simply amazing
Wow, thank you!
@@lecturesbywalterlewin.they9259it's interesting to see you still active on UA-cam and replying to some comments..
After I've seen this video once before, every time I think about GPE, pendulum or see in the class, I remember this representation
I like physics so this is very much my kind of a topic
Edit: just checked and I can see you are almost daily uploading, that's very cool!
Hi Are you alive
?@@lecturesbywalterlewin.they9259
You are an amazing person to still reply even after 8 years, you are a great teacher @@lecturesbywalterlewin.they9259
@@lecturesbywalterlewin.they9259 HELLO SIR BIG FAN
I’m not even interested in physics beyond mere curiosity and yet this man’s enthusiasm is absolutely infectious.
What I would give to learn about something from someone with such a love instead of a teacher who very clearly wants to be anywhere but a classroom.
Where are you from?
Even knowing the results, my heart was still beating fast when he released the ball
Wonder how many students were laughing due to stress release.
Your mind which has evolved to be human and work in logic understands conservation of energy and that the ball has to stop.
But the monkey part of your brain that evolved to throw rocks at tigers sees a big rock moving damn fast and expects a crushed tiger.
uh no coz if the man didn't release it with 0 speed it could have hit him that's why he was so nervous
Op was talking about the fact that they themselves, not the teacher, knew the outcome.
@@abdullahawais9267 what?
that physics teacher was a good teacher he clearly explained that when he released the ball the gravitational potential energy converts to kinetic energy as it swings down.
If you're interested in the proof:
Energy is conserved in this system.. Therefore, E initial = E final. Using this, we can use the formula for kinetic translational energy K = 0.5(m)(v)^2 and set it equal to mgH (gravitational potential formula). H is the initial starting height.
You can simplify this by canceling out m and g constants from both aides since they do not change.
We are left with H = 0.5(v)^2
Therefore, v(velocity)will change based on the height but will never exceed the total output of gravitational potential energy.
I can't believe American college learns stuff that everywhere else learns in primary school.
No its logic? I dont understand ajsk xd q if you trhow a ball obviosly it wont be at the same high than the first time you trhow it xdxdd qq qq. Q q.
@@JustapErson well they learn it in primary school too. It's just for some reason, American schools like to go over the same thing over and over again. Why do other people hate Americans? Yall find every way to hate on them
@@JustapErson You learn the basics of the basics of the basics in Primary School.
Primary School= Shit goes up and falls down. Highschool= How fast and why it falls down. College= Yeah but let's see outside of our scope of understanding how shit falls down.
That how college work.
This video pops into my feed every so often, and I always feel the need to watch it again. For some reason I also never forget it. It was great teaching
Man, this person does have balls, for sure. He bet his own life to make a regular lecturing beyond any borders of entertainment.
He has 3
No, he doesn't have the ball. Didn't you see how he dropped it? XD
I watched his physics lecture series back in 2008 when I worked in restaurants to save up for university. Over a decade later, I'm now a senior engineer in a multinational consultancy. Thanks for the inspiration and wisdom!!
Epic! Nice you got what you wanted!
good for you! That's amazing!
no big deal tho
@@jsb4812 it is
Hire me boss 🙏 i also wanted to be a good mechanical engineer 🙏
"Physics works, and I am still alive!"
That's a catch phrase 😂
Best A The Best.
One to take to heart!
I never had a teacher like that! That's a way to get you to pay attention and learn!! amazing, simply amazing
Wow, thank you!
@@lecturesbywalterlewin.they9259hi
Demonstrations and hands-on learning are important, but I feel like this professor's passion, sense of humor, and clarity are what make his method successful. Professors with that kind of energy really make classes enjoyable and get students excited about the topic. Putting one's life on the line is just the icing on the cake lol.
Taking the phrase "practice what you preach" to a literal meaning this dude has balls and conviction in what he teaches hats off to him
Literal ball.
he has wrecking-balls
he has 15kg balls
I was half expecting it, with that swing, to hit his balls
@@thatonedominus7986 Lol
his passion is what is absent from most teachers these days
If youve ever been a teacher, you'd then understand why the passion is beat out of us these days. Most of us start off with a great deal of passion
The passion isn't gone, teachers are told to teach certain things certain ways. Students have much lower attention spans/self-control/respect and aren't taught consequences. Lack of good parenting and schools/parents/students not seeing teachers as professionals or even human sometimes.
@@metalbabee As a teacher myself who has been going through a rough week because of a parent complaining about me to my supervisor and coordinator because her daughter got a 98 instead of a perfect 100 on her overall score, and my superiors lecturing me on how I should be doing better because they can't ever so no to parents, I can't tell you how much it relieves me to know that there are people out there who understand that teachers aren't these soul-sucking vindictive monsters who purposefully want to take the joy out of learning. Just like you said, it's the school, parents, and yes sometimes the students who make it hard for us to go into work everyday smiling and trying to do the best we can when we know we'll never get any thanks for it.
@@Neonarmenian I received such a shock when I first started teaching, seeing the way things were actually run in schools - it took me over two years to accept the fact that schools these days are less about teaching (or helping teachers teach effectively) and more about business. Hard to feel passionate when you are given a thousand pointless tasks and deadlines to meet instead of having the freedom to teach the way you want that's best for you and your students.
@@00ammy00 ngl I feel bad for some teachers cus in my class we complain about the mean teacher who tells us to be quiet when we talk but then when it's a nice teacher who only shouts when it goes too far they take advantage of them
I've appreciated learning more with professors demonstrating practical applications of what they are teaching. I carried that over when I was the one teaching.
Took me 2 days to try and understand what work is and this man explains it in 3 minutes more clearly then my teacher did in the last 2 days lol
i took physics my junior year, passed with a 70 forgot everything, yet somehow the way this dude just taught this it made everything flood my mind again i was literally finishing the dudes sentences for him, i wish all my teachers could be this easy to follow
So you didn't forget and actually learned the material years ago, well memorized it. Good job.
you didn't really forget anything, it's much easier for tucked away knowledge to become accessible when it's relevant
How we learn is very important. The difference between a great and engaging teacher and a teacher just goin through the motions can drastically impact how much the students learn.
Well maybe not everything...just 100% of 70% of th course ';)
@@Monsoon_Enjoyer Is that cool or sad?
The fact that the Teacher still reads comment to this day is so wholesome 😂
i want to thank you kind sir
you are welcome
@@lecturesbywalterlewin.they9259 legend
@@lecturesbywalterlewin.they9259Please confirm that you are still here.
That is actually really cool.
@@sakshamshukla3424 Why? he just replied 12 days ago
Sir You're really a great personality... ❤️
My physics professor was like this guy, he was hilarious and always made this homework and test questions from various movie or tv show scenes and why the would or would not work. Back to the Future was his favorite movie since they just made up a unit of energy and rolled with it rather than trying to make it all “sorta” reality. But he also did pop quizzes over Back to the Future physics to make sure we watched his favorite movie
Imagine if he accidentally inserted a little big of energy to the ball when he released it. RIP professor.
I know right it's so dangerous, the tiniest force could have given the ball extra speed and he would have died
A+s for everyone!
@@mujtaba9190 If it was the tiniest force, he wouldn't have died, but experience anything from gentle contact with his chin, to a broken chin, jaw and teeth.
@@LS-Moto Still dangerous bro, would you be willing to do something like that?
Beta wo Walter Lewin hai.....
I sat through physics I and II and almost exclusively learned everything from the textbook. Professors like these are gold mines of inspiration.
Nobody gonna mention how Dennis from It's Always Sunny in Philadelphia suddenly appears at 2:05?
@@John-X holy shit i see it man
@@John-X does not look like Dennis at all
Explain to me how you could do anything like this when learning 95% of the topics you learn in a physics degree. You need to learn from a textbook. It is the best way to learn. Most of the time, it is the only way to learn. Don't believe that 'you just forget it after the exam' bs either - it's not about your capacity to remember, it's about your capacity to have been able to learn it.
@@Michael-mh2tw I'm unsure what you're trying to say. Are you suggesting that lectures don't add anything? In my college classes, the quality and coherence of the professor was instrumental to my understanding of the material. Reading the textbook is one way to learn, but even though I like reading, math and physics textbooks are very dry, and my eyes tend to glaze over. It doesn't make sense to me unless someone walks me through it, preferably while drawing diagrams or graphs on a whiteboard. Taking notes is crucial.
I was homeschooled in high school, and math was one subject where I fell behind, since I had no teacher and was just attempting to absorb information from textbooks. At community college I took an algebra course online where the professor was barely even existent, and I got a B (I had to watch Khan Academy videos on the side to pass). When I went to a university, my Trigonometry and Calculus teachers were very good, and I got an A in both classes. My physics professor was hard to understand, and I got a B (I really should have gotten a C, but he was a lenient grader).
Smashing success!!!
Thank you for that lesson!😊
we need more teachers like this
"if i make a mistake this will be my last lecture" backround: *laughter*
Background : Realization
*If we had a teacher like that, physics would be our favorite subject*
Best A The Best.
I *was* lucky enough to have a physics teacher like this in high school. Energetic and enthusiastic about learning, he'd be leaping onto the top of his desk and shouting "Come on, people! Physics is FUN!" if we weren't as excited as he was about his lessons. Thanks Mr Thorpe. More than 30 years later, still the best teacher I ever had.
Hi :)
if and if
Yea but those type of teachers r very rare.
The world needs more teachers like him . The world needs more teachers like him .
Man I love your style. I threw a balloon into a fan the other day and it blew my mind when I learned (to a degree) what made it stay there. Now I’m teaching myself math to maybe go somewhere in that direction.
'' This man risked his life for PHYSICS '' You’re probably the best physics teacher out there. There should always be a way to learn something new in a fun way! ✨
He didn't risk anything.
@@snoop_diggity_dogg6059 if someone at the other end released the ball higher than that man’s height instead of releasing it in-front of himself like he did in the video then that ball would’ve obliterated his head. That’s what he was trying to explain, that you can’t make an object swing higher at the second point than the first point because that would be more energy than it was actually given
@@HouseOfWanda yea i think snoop dog was trying to say that he knew it wouldnt come back and hit him so there actually wasnt a risk
@@HouseOfWanda Does this actually answer anything about the other guy's comment?
@@snoop_diggity_dogg6059 He risked giving the ball a little bit of extra force before release, which would end up crushing his head.
I love seeing a man passionate about his profession, especially a teacher!! My wife is a teacher so I'm a little biased lol
If only we could teach like that!!
An absolute 🐻 like you should be biased bahaha she's lucky to have you.
as a student those types of teachers really changed my opinion on what they were teaching and i always remembered them and will be thankful
so your wife is a man passionate about his profession?
@@ciel_vanitas you must come from a 5th world country there buddy
He's the teacher we all need.
i remember watching this for the first time, good old days
watching this years later and understanding every concept and formula is crazy to me, I'm glad he does visual examples I wish more physics teachers were like this instead of just doing a bunch of notes and then word problems
ua-cam.com/users/shortsesyw1xihCWk
@@lecturesbywalterlewin.they9259
Hello sir, I'm a student of 10th grade and I'm in love with your lectures, so much so that I can't stop watching advanced concepts.
I can't believe I'm able to understand college level topics while being in highschool ❤❤
@@prakharsrivastava5548jee aspirant?
@@lecturesbywalterlewin.they9259 "...and most things are beautiful" .. Sir, I'm inspired. The way I see things is so simple, the fact I'm walking and standing on this land. But physics really is the study of everything we see and feel. Why wouldn't you want to know more about it? Wow :)
Do these experiments in your head try to understand what it means.
We NEED more teachers like this. It makes the students actually WANT to learn. Instead of just making them stare at a piece of paper to remember things then forget them after their finals, it makes them want to learn about the topic, as what he did here was actually interesting.
we want more teachers who put their lives on the line yea
@@fromanaltreality1020 Are you being facetious? Probably.
You still need to memorize the various formulas, but at least you know what they actually are
It’s up to the kid if they want to learn. But yeah blame the teacher if your kid is a numbskull who has no future
@@Nooop655 wait till you find out others can influence your decision. If the teacher is shit ur not going to want to learn what he teaches but if its a good teacher its going to be your fav thing in school
Thank you so much! I am in 8th grade right now and doing a science project. All of this information is really helping me put together a strong thesis for how pendulums can best simulate perpetual motion!
I had a physics teacher similar to this my junior year. He always presented everything we were learning in a tangible way with real application. Looking back it was my favorite course.
Had one similar like 20 years ago, when he brought out the Van de Graaff I had the longest hair so knew I was up.
He burst out laughing (and knew it was coming) after I stepped off the box and grounded my leg... Probably my favourite too TBH.
Did he also make a dangerous mess with broken glass?
@@veryslyfox luckily, with a tremendous amount of time and resources, modern science has been able to give us the broom
Application matters SO much in education. If you don't know how to apply knowledge in the real world there's no point in learning it to begin with.
Professor**
If you have a fun teacher like this . No subject will be hard to study for anyone .
Quantum mechanics: Exists.
Are you alive
"Physics works and i m still alive" Best dialogue
That literally got me but great lecture and beautiful explanation sir thank you so much ❤
Glad to hear that
2:45
Teacher : I might die
Students : lol
lol
lol
lol
lol
lmao
Love how the end screen with other videos comes up and almost covers the actual experiement.
I downloaded the video with UA-cam downloader so I could watch it without the recommendations.
I have never forgiven UA-cam for introducing that endscreen feature. I don't know how many years it's been and I don't care, I loathe and detest that thing and will continue doing so as long as it exists.
@@iiiiitsmagreta1240 you just keep touching the screen and it will disappear.
Love his lectures, thank you sir!
I am a jee aspirant (from India 🇮🇳🇮🇳) and I want a teacher of physics like you ❤ you gave me the feel of concept ❤😊. I am watching this video after 8 years
The true teacher can risk his life for one lesson.. that act is heroic
That is not herioc, that is just risking your life for a thing that can be done in other alternate ways
@@Ichigoyeager.exe1 and kids not able to understand anything
He did not risk his life, he has done this many times.. "students think i risk my life.." he said, "its a demonstration of physics
The risk was negligible. The biggest risk was him flinching into the ball. That is why he closed his eyes. I've done this experiment. It is very very difficult to not flinch.
@@anushreeray4016 lewin's students definitely understood the point of this experiment
That could've gone horribly wrong, but luckily he did incorporate the gravitational forces generated by his MASSIVE BALLS into this equation. Legend.
Wouldn't have gone wrong
No it could not- if he would not push the object- as he said.
You don't get it do you
Y'all must be fun at parties, lmao
Yeah imagine if the panel holding the object dislodged a little bit, sudden tremor/earthquake, badly managed cable, etc.
Kudos to the guy though but nope! 😂
Balls of steel, a profound intellect and so much passion. Much respect!
What an amazing video and an amazing teacher. You are the type of person who inspires and enriches the next generation. Great stuff!
“Physics works and I’m still alive” gave me some nostalgic Portal vibes.
I had erased Portal from my memory!!!
lol, I was gonna comment saying "All this science and still alive - makes me want to play Portal!" but decided to check the comments first. Ah well, guess I'll just have some cake.
This next test applies the principles of momentum to movement through portals.
If the laws of physics no longer apply in the future...
*God bless you.*
I absolutely love the squeal that is heard at the end of the presentation!!! Usually it’s a bit embarrassing and frowned upon to make noise during a teachers lecture, but it goes to show the true engagement you have made with your example of physics!! She just couldn’t help but make an anxious noise as you put your body on the line, and the whole room erupts with laughter because of it! Truly a presentation they will never forget, and from that, you’ve made an amazing difference in the world by making us smarter. ❤
apod.nasa.gov/apod/ap230328.html
Or that they didn’t wanna see someone’s face splattered .. w all do respect professor
@@lecturesbywalterlewin.they9259 umm, why did you posted that?
or aybe she was worried she was gonna see his face get smashed in :/
@Lectures by Walter Lewin. They will make you ♥ Physics. Thanks I guess?
We need more of you Sir in today's world... Massive Love and Respect... Love you ❤❤❤❤
What a lucky group of students to have such a passionate teacher. They will never forget this man.
Alternate Title : " When a Physics Teacher Knows He's Tough " !!
You deserve each and every like in the world
The is man be like: if it hits me I can take it.
Tuffs
Imao
Okay, but did he eat his nails without milk this morning?
This professor thought he was teaching a room full of students.... Naw this guy is teaching 41 million people, people still watching his lesson today..... Absolute legend.. we need more men and women like this teacher teaching the world for generations.. not just the youth but everyone
hello jd
50M now
Is it really per person per views?
" Physics works and i am still alive " ❤😂
This is always a great video to watch
If all teachers were like him, we would have so many more intelligent people in the world.
If all teachers were like him, some would fail to give a zero initial speed
@@philipzhu5194 RIP to all the teachers who failed to give zero initial speed
Grow up
put in risk own live for attention? like youtubers?
@@alexperez3367 its not just for attention, its to demonstrate a real world example so that the students understand that what hes saying isnt just boring, but it can actually be really interesting and maybe prevent people from dying
The irony of watching this instead of studying for a physics exam.
And still hate physics 😂😂😂😂
Ayo remember distance = speed x time
i hate physics glad i changed to an online university, so i dont have to take it anymore. forcing us CS majors to do physics 1 & 2. bleh...
The world needs more great teachers ❤️
wow everything about him is so endearing! his passion in teaching+ to this youtube channel to show the world how truly amazing physics can be!!
This is so incredible. I would have loved to have him as my instructor
He has a UA-cam channel. You can go through it.
@@peakxv13 you're already hear bud
“Physics work, and I’m still alive!”
*forgets to stop the ball, and crushes his chest instead
he walked forward so by the time it came back it would’ve hit either his crotchety or thigh area
@@ohshanana2397 or maybe the ball would hit his balls
@@ohshanana2397 OOF. that's gotta hurt
@@ohshanana2397 *femur breaker scream*
@@ohshanana2397 nutcracking intensifies
Need a teacher like this bro, If i had a teacher like this Id top physics
Your lesson is my favorite!
Thanks. great!
❤
He loves his subject so much it makes me cry.
I watch 5 year ago. This is the video that made me passionate about physics (one of the most difficult subjects) and from there I passed university thanks to physics, it pulled me through all other subjects. respect forever
I like how he applied the sample in a way so it is so unforgettable (like "risking his life" not really) that it sticks to your brain.
We had a physics professor who got around with the use of the old style crutches that have cuffs that clip to your wrists. He once did a demonstration on inertia where he carefully climbed onto a wheeled platform and then by shifting his body weight, could make the platform move. Problem: The floor in the lecture hall was not level and he ended up rolling out the door and into the hallway. I suspect he knew this would happen and did it for comedic effect, but it was still hilarious.
No he was just dumb
your physics professor sounds like an absolute legend
There was once an engineering professor who would throw himself at the safety glass windows in a very tall building to demonstrate that it won't crack or shatter because it's specially designed to withstand much more significant forces. This worked every time but once. The pane of glass remained perfectly intact but popped out of its case.
Ball: I'm a bout to end this man's career
Physics: nice try.
Physics: who said you can?
potential energy: told u its not enough ...
random wind from nowhere on its way to push the ball :
You are encouraging us very much to learn Physics. Thank you so much sir.
teacher: "i might die"
students: *laughs*
That was one of the coolest teaching demonstrations I've ever seen.
Wow, thanks!
Now look at this wonderful teacher
This is the teaching style that enables the students full attention
“I will close my eyes. I do not want to see this.” 😂🤣
When I closed my eyes.. I see a flying chair and a laughing chimney
bUt iF yoU cLOsE yOUr eYEs
I bow down before courage and determination of this person in what he does and before his extreme devotion to his work! I know perfectly well that if I'd have such teacher from Physics in my school, probably I'd be a well-known scientist by now. God Bless You, Dear Teacher! And please, do take care of yourself and of your health, for such teachers like you are very necessary nowadays! 🙏🏻🌟🌟🌟🌟🌟
Still absolutely legendary. Now that's how you make students remember what you are teaching.
If he is my prof, i would never skip a single class.
You shouldn't skip a single class in the first place since you paid for it and your goal is to pass all of your courses. Why would you even care if your professor is boring or not, you go to class, learn the objectives, study, pass exams, get the degree. Very straight forward
@@tam6493 how will u learn properly if u don't understand anything because the teacher just is a moron who don't know what proper learning is?
@@tam6493 I mostly agree with you, except for one little detail. When I was in college, I met quite a few of really useless professors. They talk, they show slides, they give homework. However, I knew this stuff will not get me ready for the exam, because what they teach in class is only 10% of the whole material. You can bombard them with emails, catch before the class, book the office hours, but it will work not always. If the professor is _determined_ not to work, he will continue feed you single-worded answers, like "it's all online", or "ask your peers", etc.
I skipped classes deliberately when I knew I am not advancing anywhere by attending them. Instead of focusing on something I can read myself faster, I will better sleep or cover more stuff in a book. In most cases, my grades went up because of skipping a class.
You don't pay only for the class. You pay for credits, exams, homework, and finally, the diploma itself.
_But_ _that's_ _a_ _completely_ _different_ _story._
@@kilovolt2494 wow, thanks for the tips for when I go to college
@@tam6493
Not quite. You don't have to attend every class to get good grades. In many classes, reading the material on your own works just fine. Let's not pretend every class is quantum mechanics.
That "you paid to be here" argument doesn't work tbh. If you can get the grade and knowledge you want while not showing up, you're not wasting money. I know some professors want to think their class is the most important thing in the universe, but many courses don't require much effort to do well in. It's not the student's fault if a class isn't particularly demanding.
I even think attendance policies are dumb(in university). If a student can do well in a class while only showing up occasionally, why should they be punished?
Remembering my childhood teacher who is just like him...
Same… unfortunately he died during one of these lectures
@@indymaximus1566 fr🙄🙄
@@indymaximus1566 ㅋㅋㅋㅋㅋ
I had a science teacher in high school like this. You cant beat it, they make everything interesting.
come to find out your childhood teacher really knew how to blow his wife's back out every valentines day and every birthday
Spectacular teaching performance! 👏
outstanding lecture ...i don't have words to say anything for you sir ...hats off to you ...luv you so much sir
What a legendary lecture Walter had delivered to Physics students!!
He is a real man within the spirit of encountering risks.
There was literally zero risk. It's science. Jeez.
@@finished6267 didnt you hear him say it relies on him giving it zero speed so there was a chance that he couldve been harmed
Even if it had touched him, almost all kinetic energy would have returned to potential by the time it did, therefore not passing on much in the way of pain.
Walter????
how do you know its a man?
Finally a teacher who makes class entertaining, I've watched the whole thing without even looking away, There are still some amazing teachers in the world.
Nobody asked!
@@Mysterioo69 I asked.
yeah but this is what almost every 7-8 grader knows , you need to be able to do calculus and solve complex stuff that is real physics
More than you think ;)
@@dhruvpawar3733 I'm in grade 9 and this stuff was news to me, granted I'm autistic and space out a lot but still
He reminds me of my dad, who’s also a physics professor. Smartest man and wisest father ❤
thank you sir your one of my favorite physics teacher. Thank you for your lectures.
Physics Teacher: (Head gets smashed)
Student in the back: He forgot to carry the 2
Lmao
😂😂😂😂
😂
I don't get it
LMAOO
Would be so funny if he said
“If it crushes me, please delete my search history”
😂😂😂
It's one thing being passionate about teaching, it's another to trust what you are teaching others. Respect.
This man risked his life just to teach his students an important lesson of energy and and angle
This is so darn epic, I wish there were more teachers like him.
He would have made school very interesting.
"Man school was boring. None of my teachers ever risked their lives for my entertainment"
Man really said teachers should risk their life for teaching students
@@venugopalan6902I agree it is a bit weird to expect that, that’s why instead my physics teacher made us do that, he’s call us up and ask us if we believed in the conservation of momentum and tried to see if we would flinch, he’s awesome
There used to be, but they pushed…
@@gridlock2958how was he risking his life? He knew what he was doing.
3:16 physics works and I am still alive
Omg we watched the same video 👁️👄👁️
@@groovepad_records bro in mine he just died
@@cespyy no way?! i saw him fly off at the end
Yes that’s what he said
in mine, he broke the wall, became a rocket and escaped the earth, guess physics works different in our universe.
Every student in that room will remember your lessons sir!! Salute!!
the teacher is gutsy, brave,and intelligent obviously
I've watched this about 6 times and it amuses every time,I absolutely adore this guy.
A teacher this passionate and engaged with his class could literally teach me anything and I would be eager to listen.
The ball should in theory “lose” some energy through heat and sound, and thus, not convert enough energy to hit him. Bravo!