1. The problem statement, all variables and given/known data An alpha particle has a charge of 2e and is fixed at the origin. A proton is located 2.00x10^-8 m from the alpha particle along the x-axis. When the proton is released, what is its speed at a great distance from the alpha particle q = 2e r = 2.00x10^-8 v = ? 2. Relevant equations ɛ = kq / r ɛ = ΔV / r ΔE = qΔV E = kq1q2 / r 3. The attempt at a solution I have no idea how to start this one. As every way I can think of doing it results in missing information that is needed to solve for v. For example when I tried to solve for ɛ and then use it to solve for ΔV, and use that to solve for ΔE, I get stuck with EE = EK but no mass to solve for v.