A constant electric field accelerates a proton from rest through a distance of 2.05 m to a speed of 1.77 x 105 m/s. (The mass and charge of a proton are m. = 1.67 x 10-27 kg and q. = e = 1.60 x 10-> c.) HINT (a) Find the change in the proton's kinetic energy (in J). (b) Find the change in the system's electric potential energy (in J). (c) Calculate the magnitude of the electric field (in N/C). N/C