i've been oposing the traditional-modern physics as much as i can. unfortunately, no one is pating much attention to what i say. in one such effort my corespondant said dx/dt by definition is the momentary speed. we have a huge differences in interpreting the basics of both math and physics. (1)if you define dx/dt as V the do you neceserily agree that x is function of V and t? (2)if so then why do you derivate x partially only by dt? (3)what is dx/dV then? (4)how do you measure the momentary speed V if V=dx/dt? your physics needs to be redone. i mean it most sencerely.