An electron entered a parallel-plate capacitor with the speed 5x10^5 m/s horizontally. The electric field is perpendicular to the direction of the initial velocity of the electron. The electron rest mass is about 9x10^-31 kg. The charge of an electron is about 1.6x10^-19 C. Assume that the electric field of the capacitor deflected the electron by 2 cm at the point where the elctron exits the capacitor and the magnitude of the electric field is 40 N/C. What is the distance traveled by the electron along its initial direction between the capacitor plates?