Lecture 6 | Modern Physics: Classical Mechanics (Stanford)
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very interesting video thanks
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brilliant video
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shame the vid+sound sync died at end
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Overeducated by the discussion. Great mentor!
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Over emphasis on friction.
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Second law of thermodynamics is a statistical law. Underlying equations of classical mechanics, which deals with the dynamics of a single point particle, are time-reversal invariant.
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@cngzsn that would be ok if physical systems are invariant under time-reversal, but they are not? c.f. second law of thermodynamics.
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How many times does he need to discuss friction!!
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Just a comment on the last question, which concerns about the order of the conjugate pair, p and q, in the definition of the Poisson bracket. If the order is changed so that the Poisson bracket is defined accordingly, this would result in a sign change in both of the Hamilton's equations. As long as one preserves the sign asymmetry (one negative, the other positive), this would simply correspond to a redundant formulation of classical mechanics, underlying reason being the time-reversal symmetry
cngzsn 2 years ago 5
video/audio syn off in the last 10mins or so
avocadomilk2010 7 months ago 3