Halliday, Resnick & Walker — Force and Motion–I: Problem 27

An electron with a speed of \( 1.2 \times 10^7 \text{ m/s} \) moves horizontally into a region where a constant vertical force of \( 4.5 \times 10^{-16} \text{ N} \) acts on it. The mass of the electron is \( 9.11 \times 10^{-31} \text{ kg} \). Determine the vertical distance the electron is deflected during the time it has moved 30 mm horizontally.