Part 3 of 6 - Analyze (a) The force due to an electric field is the one force in ZF = ma- So for the acceleration, we have F E a_:q_ m m x 10719 c)([688] v N/C) v x 1027 kg x 1010 m/s2. Part 4 of 6 - Analyze (b) Using the particle under constant acceleration model, we have v =v|.+at. f We know that the initial velocity of the proton is zero, so solving for t gives us the following. x 108 m/s v o]