> Newton's f = ma equation is really f/m proportional to a. IIRC, in this context the mass m is considred as a proportionality coefficient. Such that the force

> Newton's f = ma equation is really f/m proportional to a. IIRC, in this context the mass m is considred as a proportionality coefficient. Such that the force is propotional to the acceleration. Sure, rewriting this would fix the constant to 1, but this introduces a concept of specific force, force per unit-mass.