Special Relativity I NEED HELP ASAP!!! Find the speed and momentum of a proton (m=1.67*10^-27) that has been accelerated through a potential difference of 2000MV. Give your answers to three sig figs. Ans: .948c and 1.49*10^-18kg m/s I keep trying different ways to get this, but keep getting different answers. How do you go about this problem? I need an answer ASAP because I leave in 15 minutes to take an exam.