3 ms·
EM isn’t a force. EM flux is a force. The pedantry is important because it tells you which formulae/units are compatible with one-another. Weight (~gravitation
by derefr 6y ago
EM isn’t a force. EM flux is a force. The pedantry is important because it tells you which formulae/units are compatible with one-another.
Weight (~gravitational force), or EM flux (~electromotive force), being forces, can be directly translated into impulse in a dynamic system—reduced to an instantaneous acceleration upon a mass, and thus into the fundamental units of meters, seconds, and grams/mols.
- cyphar 6y agoDimensional analysis seems to me to be a far more fool-proof way of knowing whether a quantity should be used with a particular formula. Also the other issue is that the word "force" in physics doesn't just refer to F=ma, it also refers to the general concept of an interaction mediator. That's why they're called the four fundamental forces -- meaning that saying "gravity is not a force, it's a field" is not only overly pedantic but is also arguably wrong if you take it literally.