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Physics
Classical Physics
Electromagnetism
Susskind's treatment of a rotor in a magnetic field
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[QUOTE="MichPod, post: 6067324, member: 558988"] I see. Thank you. I do not have good intuition in this field, so I may be lost easily. Actually, in the gravitational case Susskind (in the video) says that the potential energy is proportional to the... vertical component of the angular momentum(!) so he effectively gets a formula of potential energy the same for a gyroscope in gravitational field and for a charged rotor in magnetic field. Because the energy is proportional to the angular momentum, I somehow believed that the potential energy in lagrangian will depend on the angular velocity even for a gyroscooe in potential field, as well as for a rotor in magnetic field (doesn't it?). In fact, in both cases it is not even clear for me which coordinates are used (Susskind says nothing of that, just using angular momentums formally). I suppose, this may be a the root of misunderstanding. Not that I now understand everything with this lecture, but thank you, this helped. [/QUOTE]
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Electromagnetism
Susskind's treatment of a rotor in a magnetic field
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