Hi, I'm having troubles with this problem off my lab and I'm wondering if any of you guys could help me with this one. Suppose you have fixed charge of -60 x 10^-9C at point X. Points A and B are at distances of 0.04 meters and 0.14 meters from X, respectively. Calculate the speed of point B of a proton that was moving to the right at point A with a speed of 12 x 10^5 m/s. edit: fixed the problem up, was a typo.