Field Retards Motion An electron with a speed of7.50 multiplied by 108 cm/s enters an electric fieldof magnitude 1.00 multiplied by 103 N/C, traveling along thefield in the direction that retards its motion.
(a) How far will the electron travel in the field before stopping momentarily and
(b) how much time will have elapsed?
(c) If, instead, the region of electric field is only 4.00 mm wide (too small for the electron to stop),what percentage of the electron's initial kinetic energy will belost in that region?