8.03 - Lect 1 - Periodic Phenomena, SHO, Complex Notation, Physical Pendulum
ฝัง
- เผยแพร่เมื่อ 18 มิ.ย. 2024
- Periodic Phenomena (oscillations waves) - Simple Harmonic Oscillations - Complex Notation - Differential Equations - Physical Pendulum
Assignments Lecture 1, 2 and 3: freepdfhosting.com/63073d984e.pdf
Solutions Lecture 1, 2 and 3: freepdfhosting.com/58521402f3.pdf - วิทยาศาสตร์และเทคโนโลยี
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I find it fascinating that this lecture was recorded when i was 3 months old, and here i am indluging in the same material for my course 19 years later. Timeless content professor!
I've moved soo far in engineering. I wish i spent my time with your video's earlier! I've spent days trying to understand the concepts which you've taught in 8.01, 8.02 and 8.03 which could have been shortened. Loved it! Will recommend every high school kid!
:)
Please can you send me link of 801 I can't find them
@@diwakarsingh48 did you find it?
@@diwakarsingh48 search at youtube " walter lewin 801"
( : -)~
Never have I ever seen any teacher, teaching with this much of passion😭... By going through your lectures, anyone can fall in love with physics... Thank you sir for all your efforts❣️...
interestedvideos.com/physics-youtube-channels/
15 years later I thank you very much for this a lecture!!!! I hope you have a great life.
So glad I've stumbled upon these lectures. If only my lecturers were anywhere near as good as you, Professor, my engineering studies would me so much easier. Your passion is inspiring!
+Random Username Thank you!
I so love such Teachers. Their passion is contagious. They are a Gift to Mankind.
Apart from being informative, these lectures are quite fun to watch. Thank you for such pieces of art Professor Lewin!!
THAT WAS ONE BRILLIANT LECTURE!!!!!
I JUST CAN'T GET ENOUGH OF HIS LECTURES...
:)
Its pretty mesmerizing the way you teach sir... And also you teach every fact without missing anything. Thank you sir!!
Damn Professor Nergis Mavalvala was in the audience she had no idea she will be part o the team that will discover Gravitational Waves twelve years later
Huh????
@@gamerboyss5310 professor nergis mavalvala was present in the lecture hall. She discovered gravitational waves 12 years after this lecture
Nergis was co-discoverer. Prof Rai Weiss of MIT and Kip Thorne of Caltech + 1 more person shared the Nobel Prize for this magnificent discovery.
@@lecturesbywalterlewin.they9259 nice
@@lecturesbywalterlewin.they9259 That person was professor Barry Barish. Why everyone keeps forgetting him?
I m not in high school and your abilities to make one understand are out standing that I get all of them so well!
Thank you for your lectures.
MIT lectures with you that is excellent to understand physics to demonstrate phenomenon.
No one is like you sir
You made me love physics
Huge respect from an Indian🇮🇳
Respected Sir
Your lectures have let me explore physics in a beautifully different manner. Thank you for bringing out the aptitude for physics in me. Keep doing what you do; many students owe you.
:) 😊
Dear Sir , its the best lecture I have ever had . I wish I could have taken it earlier . ❤ you Sir .
Waaoo Sir..
"Aaaa man point one five" and body language....lovely
wow, well Dr Lewin... I've seen about 90 % of your 801 and 802 videos... and now I've started with your 803 lectures.. I have to tell you... I really enjoy ALL your videos.. they are all Good!!.. but what I really need to tell you is that THIS video is the BEST I have seen!!.. From beginning to end you have scripted the video PERFECTLY.. your chalkboard execution, your Demonstrations, your Interaction with the Students.. ALL OF IT was a Perfect Lecture Video!!!.. THANK YOU!!.. I found myself pausing the video and taking NOTES and doing calculations. I was totally involved as if I were a Student sitting in your lecture hall.... Congrats!!..
thanks for your kind words
I have written something before " Oscillation in relation is okay but frequency of that should be moderate ". During the lecture I thought that this is something which is matching here. Thanks sir for your efforts always. I can feel physics more because of you. love you. :)
Thank you Professor Lewin!!!
Sir what an excellent lecture delivered by you!!!!
Love from BITS PILANI, INDIA
These badges on your shirt different in every video are just lovely especially that egg one!
I was just thinking of it haha
Professor you lectures are super exciting. Big up.
It's like I am addicting to watch your lectures, from 8.01, to 8.02x, and now 8.03...
You saved me from the bland and bored lectures by my phy prof..!!!
sir, you just enabled me to understand how nature and physics are so intimately linked .
i am from india and i want to become the greatest physicist and make my country proud.
thank you
good luck!
@@lecturesbywalterlewin.they9259 thank you very much sir
@@lecturesbywalterlewin.they9259 🤗 Love from India 🇮🇳
Dangerous lecture to watch with your headphones on xD :P
:)
Great great great no words to appreciate my aim is to become even 1% like you.
The greatest Physics professor in the world! 👍
You are truly amazing..❤️
Really professor, you gave a five minutes break in an 85 min lecture. In my high school days, my physics teacher lectured SHM ( it was the same topic in the video and little bit more) for more than 6 hours. *YES YES YES YES WITHOUT ANY BREAK*. I almost died on that day
I love you sir from pakistan...you devote your whole life for physicss
Brillian lecture.
sir todaye I firstly took your lecture. I realiz that there is no one in india who can teach like you. I will teach students like you sir thank you
no one except alakh pandey :)
I wonder how much patience you have to answer all the questions we ask
Professor Lewin I hope you are doing well. I've been busy working (and trying to breath). Someday I'll be able to revisit your classes again.
professor of the century !!!!!!!!!!!
I wish there was enough lectures by Walter to last me a life time
rofessor, are there any lectures that explain the mechanics of waves? Topics like particle velocity, string wave speed, transverse waves on a string, etc.? Please point me to those, since I heavily rely upon your incredible lectures for my interest in physics.😁
Thank you very much, great lecture! In the pendulum experiment you’ve predicted time 20.17+-0.2s and got 20.52+-0.15s. If we take the first time with the higher bound and the second time with the lower one, we get 20.37s in both cases, so can we say that the outcome was actually within the bounds of the prediction and that the friction wasn’t the problem?
predcited 20.17+-0.2s - observed 20.52+-0.15s is in very good agreement with the prediction.
sir. you are greatest a physic teacher who i ever see. your explanation is beyond of equation. are there next series 8.04?
8.04 is quantum mechanics
I wish I had a teacher like you
Physics is experiments!!!!! but the way we're learning it in school it's just. .. Thank you so much sirr it helped a lott to understand the concept 🙏🙏🙏🙏
You are most welcome
This is amazing
Very informative and excellent lecture . Thanks to you lewin sir
You are most welcome
Life would have been so simpler if he would have been my instructor🌸🌸
One of my main reasons why I want to study at MIT,the professors’ teaching are simple,easy to understand and interesting.Maybe one day I hope I will be able to join Master program at MIT.
apod.nasa.gov/apod/ap240510.html
I am understanding him little because I am Indian guy and here english is not spoken in such flow but physics practicle
Really amaze me ..... I try to write my word in English so you all my English guy 👦 understand....may my words are proper 😇
Is it possible to speed up the ball by the energy of falling and using gravity to return to the place because of the acceleration, thank you
prof i wanted to ask that can we hear the same frequency from the video as you heard phyiscally in the classroom?
And for having water in less than 17 second just make one outlet half the size of other so that at bottle intersection there is a gap also at the base of vertically held bottle make a hold and volla we have filling at a much accelerate rate
Hello! I'm a current MIT student and love your lectures! I was able to ASE 8.01 because of them! For that, thank you so much. In fact, I'm considering taking the 8.03 ASE. Do you think the 8.03 curriculum has changed much since you've taught it?
8.01, 02, 03, 04, 05, 06 cannot change very much
who will be teaching 8.03?
Sarah, how to get admission in MIT...
Plz explain to me
Sarah plz share how to get admission
About the heat problem. Is it because length gets bigger when heated?
32:30 trick question haha 😆 Amazing lecture!
You are physics legend ❤
Thank you sir for your help
Thank you dear prof! you are such a good prof, AMAZING!
You're very welcome!
@@lecturesbywalterlewin.they9259 Thank you ! 🤗
In 8.03. do you also use book "Physics" by Ohanian? I managed to get a pdf version of a book called 'Physics for scientists and engineers,9th edition' from Serway,Jewett and it seems like a very nice book and plus it's very similiar to your lectures.
+Ivan Antunović I used Antony French's book and Bekefi and Barrett.
Where you got this book
I m doing the chapter on oscillations. This lecture trigged my imagination.
This is absolutely gorgeous and mesmerizing lecture
Glad you think so!
@@lecturesbywalterlewin.they9259 I have passion for physics. Currently I'm in physics major in "Dhaka University" where the famous "Bose-Einstein condensation " was discovered by Professor Satyandranath Bose. There are now only a few good professors left. I wish I were in your University 20 years ago when you were young. When you had good days 😄. I have mad respect for you.
Good... understable about periodic motion...
If you notice the equation, we can generate gravity force in the circle shape like in the movie if we had enough radius and orbit velocity.
# For signaling sometime we use inband, outband signal then for some telephone application need to add keypad sound. Or some ppl may have an extra wide frequency range or driving.
Please tell me in which lecture the acceleration overcomes gravity,the example of a ball gaining speed due to the attraction of the earth?
Professor, At 17:00, are you trying to say that x0=xcost(wt+phi)? but wrote it as xcos(wt+phi)?
Professor, if we are not doing anything then is it periodic.
I mean to say that the graph of our moyion is Y=0
Where x axis represents time and y represents displacement
Hello sir can you please explain why does flag perform wave motion , what is the necessary restoring force on it in case of steady winds. I have been thinking about that for so long now . It was at 7:08
What an honor it must’ve been to be a student of Walter Lewin. Like watching Michael Jordan teach kids how to shoot basketball. Thank you for your contribution to physics.
Professor Lewin, i Wonder if there's any subtitles available. Thanks for all the great work!
there are no subtitles on 8.03
There are subtitles for 8.01, 8.02, and for many talks. Click on cc. There are no subtitles for8.03
Love from India sir. 🙏🙏🙏🙏🙏🙏🙏
Sir,
Is the period of oscillation a function of initial angular displacement in case of large oscillations (>20deg) in simple pendulum?
what I derive in class are periods for small angles. In the case of a simple pendulum the periods at 1 degree or 10 degrees are the same within the accuarcy of my measurements. In French' book you can find the EXACT period for any angle; it's a series. Large angle periods can also be derived for physical pendulums - try to find them online.
how does he calculate the error in the Hoop predection?
Sir,when i was reading a book on physics by resnick and halliday it was mentioned that the velocity of the particle at equilibrium is the highest when it is undergoing a SHO. But there was no explanation on why is it so.Could you please tell me why?
Release a pendulum at angle theta. Its highest speed is when theta is zero. That's its equilibrium position.
The total energy in a system undergoing SHM can be considered a constant in the absence of damping.
The total energy is a combination of potential and kinetic energy, and the proportion of the total energy taken up by either kinetic or potential energy keeps changing.
At the equilibrium position, the kinetic energy contributes all of the total energy, resulting in the highest velocity.
The opposite is true when the object is at the extreme position, or when the displacement equals the amplitude, at that instant, all of the energy consists only of potential energy, giving an instantaneous velocity of 0.
Professor Walter, After taking 8.01, 8.02, 8.03, i'm considering taking 8.04 & 8.05 but i don't know which courses should i take after those. i saw 8.286 "The Early universe" in MIT OCW, & saw 8.421+8.422 (Atomic and Optical Physics I,II), also saw 8.333+8.334 (Statistical Mechanics I,II). I noticed that 8.333+8.334 & 8.421+8.422 are Graduate courses not undergraduate so i was wondering if you can suggest me what to see next?
Thanks in advance, btw i enjoyed your courses alot
keep doing what you are doing
so you think that i should go after 8.286 when i finish 8.05?
Thanks sit
Love from india
thank you so much
Sir at 1:12:42, the mass at P is not equal to the mass of the whole ring.
but why is it taken that way??
Professor, what was it that you aid was on the pipe at 48:51? Couldn't hear it properly. Was it "grid"? But what is meant by a grid? Also, did anyone come up with an explanation for the pipe producing 110 Hz just by heating and cooling?
Because of the hot grit the tube becomes a chimney. Cold air enters the bottom while the hot air leaves at the top hence creating the tone.
Sir,
If we try to draw the graph for y=a sin^2 (wt) then we will get same graph as sine curve but it is shifted above the x-axis.so that object will oscillate between x=0 to x=a with mean position at x=a/2 and it's time period will be half. So this condition is same as that of SHM with shifted mean position. So why can't we consider it as SHM?
sin^2 is not a solution to d2x/dt^2 + kx = 0. Thus it is NOT a SHM.
sin 2wt would be a solution.
Excellent lecture Sir. Thanks 🙏🙏🙏🙏
Most welcome
Sometimes periodicity makes me wander around the realm of so-called reincarnation of organisms. To my limited knowledge, substances can cycle, regenerate, and combine again to some complexity, except for energy. What if the soul is something like energy? Does that imply the non-periodicity of soul and incompleteness of reincarnation? Enough wandering, it is time back to the series of lectures of vibration and wave!
This a a hot topic in theoretical physics. Sadly there is no verifiable information on the topic and it cannot be tested. Nothing is implied nor proven to be untrue as of now therefore this topic is nothing but a conversation to have with no scientific evidence involved. Since there is no evidence to disprove it, it is assumed to be a theoretical possibility. Maybe one day.
At 30:31, why did you multiply the error for your reaction time with square root of 2?
Isn't your reaction time independent of the mass of the object ?
sqrt of the ration of the 2 masses
@@lecturesbywalterlewin.they9259
So if we assume m_2 = 10000*m_1 then the ratio is sqrt(10000)=100 and therefore the uncertainty of measurement is also 100*0.15s = + or - 15 seconds. But if you were to measure it, it would still take 0.15 second to react and not 15 seconds.
What textbook are the assignments from? Could you provide a link if possible for the textbook? Thanks
I have ni links
8.01
Physics
Hans C. Ohanian
Physics
Volume 1
2nd edition
W.W. Norton & Company
ISBN 0-393-95748-9
8.02
Physics for Scientists & Engineers by Douglas C. Giancoli.
Prentice Hall
Third Edition
ISBN 0-13-021517-18
8.03
Vibrations and Waves by
Anthony French
CRC Press
ISBN 9780748744473
8.03
Electromagnetic Vibrations, Waves and Radiation
by Bekefi and Barrett.
The MIT Press
ISBN 0-262-52047-8
Lectures by Walter Lewin. They will make you ♥ Physics. Thank you for the swift response
Bravo!
Sir is there way to measure the value of force without using netwon law
@7:52 ☆Love is a periodic motion☆
Great example 😍😍😂😂
Hi Professor Lewin, thank you so much for these lectures - they are arguably the best in the world (prove me wrong!). At 19:35 you claim that the solution to the differential equation is the wave equation. I taught myself how to solve these sorts of second order differential equations, and arrived at the conclusion that x(t) = x_0*cos(wt)! This is very close to what you have on the blackboard, but missing the phase constant phi. How does phi enter the differential equations?
the angle phi is cricial because your solution demands that x=x_o when t=0 but that is an unnecessary restriction. By adding the phi, x can be x_o at any time that is consitent with the initial condition.
Yes! After all it is a phase shift by definition! Thank you again for the prompt reply! Hope you are safe and well staying at home :) I’ve decided to take up 8.03 :)))
Wonderful lectures sir!
Can you please explain how the tornado helps air flow more easily at 50:23?
use google
@@lecturesbywalterlewin.they9259 Lmao
Love you sir
What if the mass of spring is not so small or also almost equal to the mass hanging ?
Happy Teacher's Day from India.
Why does the long red pole pole produces sound when you heat it from the bottom?
I have an answer.. It may be wrong but did the mesh absorb the heat and after you removed the flame,started to vibrate at the resonant frequency of the pole,and the pole picked up that frequency and produced that sound.
Ryan Oberoi Google "Rijke Tube"
It's fabulous, isn't it?
Lectures by Walter Lewin. They will make you ♥ Physics. yes it is
hello sir I'm a new physics teacher from morroco, your lectures are really helpful for me and I want , if it's possible, the handout of 8 01, 8 02 and 8 03 in order to complete understanding of the lectures
thank you sir for your creativity
Ahmed, of course you may hand out anything to your students related to my lectures. My homework assignments, my exams, the solutions and my Lecture Notes are posted below the video thumb nails on my channel.
thanks a lot sir I appreciate that , and there is one more request please, can I have your facebouk and Email account
Sir ,what is the best textbook on wave and vibration which gives more concept.
It's a honour to hear something from you
Berkeley Book (I forgot the title)
@@lecturesbywalterlewin.they9259 sir, is it from Berkeley physics course series "Waves by Frank S. Crawford, Jr.
Which book text book should I use??
what's this 26-100 you keep referring to?
it's the lecture hall at MIT where I gave that lecture
@@lecturesbywalterlewin.they9259 why it's named as 26-100🤔 sir
It just is, you cant be explaining every little thingy
I have a explanation for the heated cylinder phenomenon and its i say similar to the bottle with water phenomenon and the hot gases tend to come out of the cylinder but at the same time cold gases neeed to go in and that happend in a way similar to the bottle experiment and due to this the air gets a wave like motion giving us the sound of I'm wrong I would be happy if someone could correct me
What is most fascinating thing in physics that is not in any other subjects
Professor, why in your simple harmonic oscillation there is no diffrents between cos and sin? In my books there is sin but you have written there cos and im really confused now.
+pajaczekps3 a cos and a sin only differ by a phase angle. Thus you may choose either one. You are free to choose your t=0. If you move t=0 by (1/4)T then a sin will become a cos and vice versa.
Thank you kindly ✍️
You are very welcome
nice lectures
Sir, but when the mass of the bob is increased the string probably would stretch and would increase the time period right? Correct me if I am wrong..
how many minutes into the video?
I was confused with you hanging with the pendulum>>
yes, you have a good point. The cable is made of steel. Due to my weight it extended by only 2 mm. That's much much smaller than the uncertainty in the length, thus it could be ignored.
Sir
If a light bulb blinks every 1 sec can we say that it is oscillating with 1 oscillation per second