Newton Laws
An electron travels in a straight line from the cathode of a vacuum tube to its anode, which is 1.5 cm away.
It starts with zero speed and reaches the anode with a speed of 5.8 X 106 m/s. Assume constant acceleration and compute the force on the electron.
This force is electrical in origin. The electron's mass is 9.11 X 10-31 kg.