Comment Re:Relativistic Mass is fundamentally wrong (Score 1) 347
Try using F=d/dt mv
Yes...and that does not work at all for relativity since you are missing the gamma factor.
F=ma doesn't work naively in any case where the mass is not constant, relativistic or not.
True but it doesn't work even when mass is constant e.g. for an instant of time under relativity because the 'gamma' factor is a correction to the velocity, and here you have acceleration so there is no simple gamma factor. You are also wrong that it is purely pedagogical because at a fundamental level we know that e.g. the mass of an electron is due to its coupling to the Higgs field. This coupling does not become larger with an increase in energy hence the electron mass remains constant. Still not convinced? Einstein himself argued against the concept.