ok, so, I know e=mc2 is a way i can find what quantity of energy a mass has. and i know that as objects increase in speed they become more massive, which i assume is also elegantly portrayed in this equation. but, this kind poses a problem for me, because i am wondering how much velocity increases mass. it would seem that as you put more energy into an object to speed it up, if i am taking the meaning correctly, then it becomes more massive, and requires more energy in order to accelerate it further. this would also mean that the more massive an object is, the more of an effect Δv will have on Δm. I for some reason, had the impression that it was more Δv of an object that would increase its mass, rather than the quantity of energy input. or rather, and i suppose it still may be this way, if you have 2 objects. one having mass X, and one having mass Y, if you increased their velocity N times, you'd end up with each object having bX and bY mass, by some ratio of N which may even be N=b, but i suspect not. so, i guess what i'm wondering, is how really, i would go about calculating the increase in mass of an object in relation to a change in velocity, or an increase in velocity.