Two protons are released from rest, with only the electrostatic force acting. Which of the following statements must be true about them as they move apart? (There could be more than one correct
Choice.)
A) Their electric potential energy keeps decreasing.
B) Their electric potential energy keeps increasing.
C) Their kinetic energy keeps decreasing.
D) Their kinetic energy keeps increasing.
E) Their acceleration keeps decreasing.

Question

Quizplus · Accepted Answer

As the protons move apart, their electric potential energy decreases because they are moving to a position of lower potential energy. The decrease in potential energy is converted into kinetic energy, so their kinetic energy increases. The electrostatic force decreases with distance, leading to a decrease in acceleration.

Two Protons Are Released from Rest, with Only the Electrostatic