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Thx for the help and sorry if my english its not the best

- Thread starter Adamecius
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Thx for the help and sorry if my english its not the best

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olgranpappy

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"acceleration" is the first derivative of velocity w.r.t. time. "jerk" is the time derivative of acceleration or the 2It's called the "reaction force" and is proportional to the "jerk" (the first time derivative of the velocity).

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olgranpappy

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righto, that's what i meant to write--slip of the pen."acceleration" is the first derivative of velocity w.r.t. time. "jerk" is the time derivative of acceleration or the 2^{nd}derivative of velocity.

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Hallo AdameciusSo from the fact that the charge is radiating, i should consider some dissipated force, in order to reproduce in the equation of motion, what energy conservation says.

I am very attracted to springs. They are made of spiralling thread resistive of torsion, beacause bending of the thread itself is easy. This torsion has as counterpart: warming up. The dissipation must be in the warming up of the thread that is my answer.

greetings Janm

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Hello BobIn Panofsky and Phillips "Classical Electricity and Magnetism" chapter 19 "Radiation from an Accelerated Charge".

I have the second edition of the book and try to find out which equation you mean. Is it par. 19-4 "The "convection potential",

which starts with the Lorentz expression: F=e(E+u x B) and then equation (19-25)?

Years ago I studied the Lienard-Wiechert potentials a little, attracted to the concept that field-changes propagate with the velocity of light.

greetings Janm

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So your book comes from 1856. 13 years after W.R.Hamilton found his quaternions and 17 years before maxwell wrote his "treatise on electricity and magnetism". I come back on the equations you mentioned and by the way my research of the Lienard Wiechert potentials is based on Laundau L.D. and Lifschitz : the classical theory of fields (translated from the Russian) A. Wesley 1960 par 62.

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