Are you sure more than 93% of physicists would say yes? I would say "what if the mass changes" or "what if the speed of the mass is relativistic" -- then you h

Are you sure more than 93% of physicists would say yes? I would say "what if the mass changes" or "what if the speed of the mass is relativistic" -- then you have to use something else, like F = Integral[dp, dt], and F = ma no longer holds. Rather, it turns out to be F = (gamma)^3 m a. Assumptions, assumptions! They plague everybody, not only economists. F = ma only in the non-relativistic limit with a constant mass. Before you say "of course we are thinking in the non-relativistic limit", be mindful most of the rest of the universe, moving around at sizable fractions of c compared to us, disagrees with you.