Hi all, I have charged particles (protons) accelerated by an electric field. If I add up all the momentum and find the change in momentum per sec I can find the acceleration of my craft by dp/dt /M = a If I add up all the kinetic energy of the particles and find the KE per sec, I can find the acceleration by Sqrt (KE/t /0.5*M) = a They are both similar calcs but give wildly different values. KE calc is 10^9 bigger. So which is it? KE or p to find acceleration?