![Sasha Tchekhovskoy](/img/default-banner.jpg)
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Sasha Tchekhovskoy
Добавлен 20 сен 2011
Lecture 13: Frame transformations, Midterm problems, Energy and reference frames
00:00 Recap: frame transformations
08:01 Midterm problem: two springs in 2D
21:57 Midterm problem: planet on eccentric orbit
34:37 Energy and reference frames
08:01 Midterm problem: two springs in 2D
21:57 Midterm problem: planet on eccentric orbit
34:37 Energy and reference frames
Просмотров: 1 076
Видео
Lecture 12: Reference frames, Coriolis force, and Hurricanes
Просмотров 1,4 тыс.3 года назад
00:00 12.1 Inertial reference frames 13:37 12.2 Accelerating and rotating reference frames 28:44 12.3 Coriolis and centrifugal forces 48:56 12.4 Examples of Coriolis force: baseball 57:54 12.5 Examples of Coriolis force: hurricanes
Lecture 14: Rotations
Просмотров 1 тыс.3 года назад
00:00 14.1 Active and passive transformations 08:05 14.2 Time derivative of rotating vector 15:22 14.3 Orthogonal transformations and degrees of freedom in 3D rotation
Lecture 1.1 of Classical Mechanics (PHYS-411)
Просмотров 11 тыс.3 года назад
Welcome and course logistics
TEACHx: Connecting with your virtual audience using the green screen or lightboard approaches
Просмотров 2793 года назад
Alexander Tchekhovskoy Achal Bassamboo Shane Larson
Lecture 11: Introduction to Computational Physics (PHYS-352)
Просмотров 1,7 тыс.3 года назад
Random walk and diffusion
Lecture 10: Introduction to Computational Physics (PHYS-352)
Просмотров 4303 года назад
This lecture discusses how to simulate waves on a computer.
Lecture 9: Introduction to Computational Physics (PHYS-352)
Просмотров 5083 года назад
How does transition to chaos work? I use 3D movies of a driven chaotic oscillator created especially for this lecture to motivate checking out discrete chaotic maps. I then continue discussing an example of such a map, a logistic map, and use it to reveal how the period doubling and transition to chaos happen.
Lecture 9: Introduction to Computational Physics (PHYS-352)
Просмотров 873 года назад
A 4K version of this video is available here: ruclips.net/video/jQaFinzUZaY/видео.html
Lecture 10: Introduction to Computational Physics (PHYS-352)
Просмотров 1053 года назад
A 4K version of this video is available: ruclips.net/video/iXI1Po5QXi0/видео.html
Lecture 8 Introduction to Computational Physics (PHYS-352)
Просмотров 5913 года назад
This lecture discusses planetary motion
Lecture 7: Introduction to Computational Physics (PHYS-352)
Просмотров 5953 года назад
This lecture discusses performance of the Euler, RK2, and RK4 methods, as well as chaos in a driven oscillator.
Lecture 6: Introduction to Computational Physics (PHYS-352)
Просмотров 5894 года назад
Lecture 6: Introduction to Computational Physics (PHYS-352)
Simulations of Jet formation and Interactions with Ambient Medium (3-minute version)
Просмотров 1044 года назад
This is a short (3-minute) version of the talk by Alexander Tchekhovskoy at Scientific event E1.18 at COSPAR-2021
Lecture 5: Introduction to Computational Physics
Просмотров 8644 года назад
Lecture 5: Introduction to Computational Physics
Lecture 4: Introduction to Computational Physics
Просмотров 9214 года назад
Lecture 4: Introduction to Computational Physics
Lecture 3: Introduction to Computational Physics (PHYS-352)
Просмотров 1 тыс.4 года назад
Lecture 3: Introduction to Computational Physics (PHYS-352)
Lecture 2: Introduction to Computational Physics (PHYS-352)
Просмотров 1,6 тыс.4 года назад
Lecture 2: Introduction to Computational Physics (PHYS-352)
Lecture 1: Introduction to Computational Physics (PHYS-352)
Просмотров 9 тыс.4 года назад
Lecture 1: Introduction to Computational Physics (PHYS-352)
WEDS3FEB E1.17-18-21 ALEXANDERTCHEKHOVSKOYFULLPRERECORDEDVIDEO
Просмотров 824 года назад
WEDS3FEB E1.17-18-21 ALEXANDERTCHEKHOVSKOYFULLPRERECORDEDVIDEO
Lecture 1, Conservation Laws, Physics-411, Classical Mechanics
Просмотров 9 тыс.4 года назад
Lecture 1, Conservation Laws, Physics-411, Classical Mechanics
Lecture 2, Many Particle Conservation Laws & Constraints, Physics-411, Classical Mechanics
Просмотров 4,2 тыс.4 года назад
Lecture 2, Many Particle Conservation Laws & Constraints, Physics-411, Classical Mechanics
Lecture 3, Virtual Work and Lagrange Equations, Physics-411, Classical Mechanics
Просмотров 4,9 тыс.4 года назад
Lecture 3, Virtual Work and Lagrange Equations, Physics-411, Classical Mechanics
Lecture 4: Examples of Using Lagrangian Approach
Просмотров 2,4 тыс.4 года назад
Lecture 4: Examples of Using Lagrangian Approach
Lecture 5: Principle of Least Action, Symmetries, and Conservation Laws
Просмотров 2,4 тыс.4 года назад
Lecture 5: Principle of Least Action, Symmetries, and Conservation Laws
Lecture 6: Hamilton's Principle of Least Action, Two-body Problem
Просмотров 2,3 тыс.4 года назад
Lecture 6: Hamilton's Principle of Least Action, Two-body Problem
Lecture 7: Kepler's Law, General Central Force, Virial Theorem
Просмотров 1,8 тыс.4 года назад
Lecture 7: Kepler's Law, General Central Force, Virial Theorem
Lecture 8: Stellar explosions: fast and slow mass loss
Просмотров 1,1 тыс.4 года назад
Lecture 8: Stellar explosions: fast and slow mass loss
thank you so much sir!! you are the best <3
These makes no sense to me
@@palladium3363 Can you be more specific? Is there a particular aspect of the lecture that's confusing?
in 7:18 why is not just 1/2 kx^2 in terms of the potential energy?
Spring potential energy would be 1/2kx^2 if x were the length of the spring. However, because the spring is on the cart, which is moving relative to our coordinate system, we need to convert x from the x-y-z "lab" frame into the x'-y'-z' "cart" frame: x' = x - xcart = x - vc t, where xcart = vc t is the position of the cart at time t and vc is the velocity of the cart.
The fact that principle axes could be conveniently chosen to be orthogonal is due to the moment of inertia tensor being symmetric.
Thank you for making this videos I am on my way to take a test and not a big fan of Laudau material this videos as saving my semester
sir I am a student of bsc hons sos physics
I am not understanding your English
I am indian
thank you!!!!!!
Hi, I'm a Hanoi University of Science and Technology student from Vietnam. Thank you so much for your lectures
great lecture. thanks you sir🙏
Hey, man, your entire course is FANTASTIC, the best in Classical Mechanics i ever watched on RUclips.
Amazing video!
You mention a one year period of earth’s precession as the source of earth’s cycle of seasons. However, I was taught in school that the seasons were the result of the constancy of earth’s axial pointing direction as it moves around the sun. Also, I thought that the term “precession” referred to the 26000 year cycle of earth’s axial pointing direction.
This is one of the best explanations I've ever heard about this topic! Love your channel, please keep the videos coming!
The T matrix seems to be act more like mass than kinetic energy.
19:43 I hate these lecturers when they are like nike commercial with "just do it" motto, do not explain why at all :(( This is something and it becomes something. why? It's just getting more and more painful everyday, thank you!!
Could post a road map to learn this
Thanks for this! Could you tell us more about the links to Schrodinger please?
@@jftsang I am sorry, I am not able to modify/update the lectures, but you can try googling "connection between Hamilton-Jacobi equations and Schrodinger equation."
from 17:07 i got lost...
I'm simply expressing items 2 and 3, which are given on the bottom left, for the specific (quadratic) form of the potential V.
Thank you for putting this on RUclips. This way I can study efficiently. Learning this from Goldstein would be very, very difficult for me. You are doing a great job!
Thank you for putting this on RUclips. This way I can study efficiently. Learning this from Goldstein would be very, very difficult for me. You are doing a great job!
Thank you for putting this on RUclips. This way I can study efficiently. Learning this from Goldstein would be very, very difficult for me. You are doing a great job!
Thank you for putting this on RUclips. This way I can study efficiently. Learning this from Goldstein would be very, very difficult for me. You are doing a great job!
is this simulated using grid based code?if so how did u interpolate between the grid points
Are u writing in reverse.?
Luckily, didn't have to do that: I mirror the video in a video processing software
Very helpful videos. Much appreciated. Quick question: what happened to (-) sign in the raltions given for F1 flavor trnsfrm at 1:49? What am i missing? Thanks!
Hello. You are right, there should be a minus sign. When you want Q=p and P=q you have to set λ= -1 in the previous video at 24:01. You have to add dF1/dt of course. In this case K= -H. The reason λ is often omitted is that, as he said, it does not contain much interesting physics. ruclips.net/video/ADk5igbjQVg/видео.html
The constant opening and closing of your sharpies are very noisy and annoying. There is software out there that enables you to write mathematical formulas instead of writing on a board on a constrained space. Stop changing the view to your dog, it restricts the view on the board.
I'm sorry that this style of lectures isn't working out for you! It's *much* easier to write on a tablet and would take me 10x less time, but then I would be looking at the tablet rather than at you. Coleman is sad you didn't like him :)
keep on going with changing the view to the dog, i kinda like it haha@@atchekho
Great series, man.
Very good bideo. Nice explain in small time
Thank you for the lectures
Thank you, great explanations! But the kinetic energy should be: T = 1/2 * m * (dq/dt)^2 , right? so is it a mistake in the video or you considered the general coordinate q as: q=m*v and then: T = 1/2 * (dq/dt)^2 ?
Mass is set equal to 1.
@@diegobautistaaviles4182 thanks
Thanks sir you made it clear and understandable you're a savior
I prefer Einstein notation
Amazing video! But when you said Schrödinger equation I got PTSD
Thanks for your help 👍 very helpful for me in lib
Can someone advise me what is meaning of full-time derivative and why it doesn't affect Equations of Motions? (at 18.28) (BTW these are great lectures)
I hope you get to read this comment even if it’s one year later hehehe. A full-time derivative is a derivative that contemplates both explicit and implicit change in time. Imagine a function that describes the temperature of a room at each point, and at each moment. Thus, the function for the temperature of the room is something of the form T(x,t). As an example, take T = x^2 + t. So, in a pure calculus context, if I asked you how that function changes in time, the only logical answer would be to give me the partial derivative of the function with respect to time: ∂T/∂t. In this specific example: ∂T/∂t = 1. Now, in mechanics, we have an extra ingredient: motion. For example, consider we describe the motion of a bug through the room by a function x(t). The temperature experienced by this bug is then T = T(x(t),t). Note that the position parameter of the function also depends on t. For example, if x(t) = sin t, then T = sin^2 t + t. If I asked you for the time derivative of this temperature, you can’t just simply give me the partial derivative as before (∂T/∂t) = 1), because as time passes the temperature experienced by the bug may change both through the sole time depence of t and by the motion of the bug. It is necessary to introduce a new derivative that contemplates the changes through motion. We call this new derivative the total time derivative. We denote it by dT/dt. One way to calculate it is to take the time derivative of the function you are studying after substituting the explicit time dependence of position. I’ve done that before, so in this case, it follows that dT/dt = 2 sin t * cos t + 1. Now, the reason why you take out the time derivative of the Lagrangian is the theorem proved before in the video.
I love your dog 😍
best lecture on hamiltonian formulation ive found on youtube
At 31:52 the Poisson bracket of Q2 and P2 should be 1 right
yeah
same note,, yea it's 1 not 0
in 33:25 equations for angular momentum are wrong
i don't think so
k = G*(m1 + m2) is bcz you've set `mu` = 1. Am I correct? Otherwise k must be G*m1*m2.
You want the potential to stay the same, so G m1 m2/r = G(m1+m2)mu/r. Hence, the value of k.
Fantastic. Many thanks
Also.. impressive backwards handwriting!
Thanks! I'm actually writing in a regular way, and then mirroring the video in a video editing software. Enjoy!
@@locallyringedspace3190hahaha im crying
Thank you so much for these Lectures, greetings from Colombia
Give clear image please
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Here's the playlist link: ruclips.net/p/PL39mDr1uU6a5iYPIcDi5x_vt8l9FZjCSo
Here's the playlist link: ruclips.net/p/PL39mDr1uU6a5iYPIcDi5x_vt8l9FZjCSo
Here's the playlist link: ruclips.net/p/PL39mDr1uU6a5iYPIcDi5x_vt8l9FZjCSo
Here's the playlist link: ruclips.net/p/PL39mDr1uU6a5iYPIcDi5x_vt8l9FZjCSo