An electron is accelerated from rest for a time of 10R-9 seconds by a uniform electrical field that exerts a force of 8E-15 N on the electron. What is the magnitude of the electrical field? What equations should I use? There's E=F/q and E=kQ/r^2 They both dont work. The speed id the electron after it has accelerated for 10E-9 seconds is most nearly? How do i calculate this?