A vacuum tube has a vertical height of 50.0 cm. An electron leaves from the top at a speed of 3.2 x 106 m/s downward and is subjected to a “typical” Earth field of downward.
(a) Use energy methods to determine whether it reaches the bottom surface of the tube.
(b) If it does, with what speed does it hit? If not, how close does it come to the bottom surface?
(c) How does the gravitational force on the electron compare to the electric force on it, both in magnitude and in direction?