1. The problem statement, all variables and given/known data An electron with velocity v = 2.4 × 10^6 m/s i encounters an electric field E = 1250 N/C i. How long will it take for the speed to be one fourth its original value? 2. Relevant equations Not sure Maybe E = kQ/r^2 3. The attempt at a solution I don't know where to begin. Looking at it makes me think it won't slow down because both are pointing in the positive i direction. Also, does an electron have a charge of -1.602 X 10 ^-19 C?