In a vacuum, a proton (charge = te, mass -1.67 x 10 " kg) is moving parallel to a uniform electric field that is directed along the +x axis (see figure below). The proton starts with a velocity of +8.60 x 10# m/s and accelerates in the same direction as the electric field, which has a value of +3.40 x 10 N/C. Find the velocity of the proton when its displacement is +2.0 mm from the starting point. +2.0 mm Number i Units