Classical Mechanics | Lecture 4
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(October 17, 2011) Leonard Susskind discusses the some of the basic laws and ideas of modern physics. In this lecture, he focuses symmetry and conservation laws, including the principle of least action and Lagrangian methods. This course is the beginning of a six course sequence that explores the theoretical foundations of modern physics. Topics in the series include classical mechanics, quantum mechanics, theories of relativity, electromagnetism, cosmology, and black holes. Stanford University http://www.stanford.edu/ Stanford Continuing Studies http:/continuingstudies.stanford.edu/ Stanford University Channel on YouTube: http://www.youtube.com/stanford
Comments
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did he address hamiltonian formalism in the course?
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Presentation is weak and scattered
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28:00 mX(dot)squared/2 is the KE of the first particle. The next term is the KE of the second particle. Then finally there is the third term which is negative V (as a function of X-Y), which is the PE of... of what exactly? Is it the potential energy of the first particle plus the potential energy of the second particle (all taken together in one term)?
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I luv diz lectur soooooooo much 3 easy 5 me
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He neglected to add primes to every new (transformed) coordinate, and this got very confusing fast because you never knew when he'd take the original coordinates or the ones he transformed to.
Generally, it shows he had a worse day that day, and it's a pity because this is a pretty difficult subject that should receive more TLC. I had to reach to other sources before I began understanding what he was doing.
BTW, the question about 1:33:50, if we have a bunch of delta squared values, how do we know they won't add to anything significant if we do a bunch of steps, like combining all the small transformations. The answer is, that in the equation there's both a delta and a delta squared. Delta squared is as much smaller than delta, as delta is smaller from a normal "big" number. By the time you stop summing up all your deltas adding them up to a large transformation by a normal number, the delta-squares will only add up to a single delta. -
rotation transformation is wrong is not it?
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fucking rotating frames chum
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Is there anyway we can get access to those notes he mentioned?
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I miss numbers. 😩
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get his book classical mechanics the theoretical minimum , this lecture is chapter 7
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Is dL = 0 when qdot^2/2 the reason why photons experience no time?
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My professors would explain all that in few minutes and nobody would understand....
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What does he demonstrate with viscous liquid equation? Does the equation demonstrate symmetry or conservation? I could not understand.
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at 19:00, why does the kinetic energy disappear when finding the momentum of the lagrangian? In other words, why is it assumed that d((q'_1 + q'_2)/2)/d(q_1) = 0? Is it because we are summing the velocities as two points to define the KE, and these velocities don't depend on their positions at that instant in time? I don't see how that could be since velocity is a function of position and time.
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Darwin theory is based on simple eye observation and science is based on strong evidence and fact.
Man came from a monkey because he looks like a monkey! What’s next the Sun rise because it looks rising! or the Earth is flat because it looks flat!
Say there is no God but the God of Abraham you shall enter heaven.
If you say there is more than one God you will spend eternity in hell.
Prophet Noah said there is only one God.
Prophet Abraham said there is only one God.
Prophet Moses said there is only one God.
The church said there is three Gods.
Who are you going to trust, the prophets of God or the church? -
listen to this man make me wanna go to this university!
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Thank You !
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African American freedom by linwood B
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because science is fucking awesome! I do this all the time too, I think, we all do :)
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