A constant electric field accelerates a proton from rest through a distance of 1.55 m to a speed of 1.97 ✕ 105 m/s. (The mass and charge of a proton are mp = 1.67 ✕ 10−27 kg and qp = e = 1.60 ✕ 10−19 C.) HINT (a) Find the change in the proton's kinetic energy (in J). 3.24E-17 J (b) Find the change in the system's electric potential energy (in J). The work done by the electric force and the change in electric potential energy are related by WFe = −ΔPE. This relationship holds for any conservative force: the work done by any conservative force equals the negative of the change in the associated potential energy. -3.24E-17J (c) Calculate the magnitude of the electric field (in N/C). N/C

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