Question

1. What happens to the kinetic and potential energy as two electrons move closer to one another? A:
2. Is the force between an electron and a proton as they come closer together attractive or repulsive? A:
3. When two bar magnets are placed end-to-end they repel each other. What does that tell us about their charges? A:
4. What is Coulomb's law? A:

one sentence each

Answer 1

1. A: As two electrons are brought closer, their electric potential energy increases (you must do work) and, if no extra energy is added, their kinetic energy decreases.
2. A: The force between an electron and a proton is attractive and increases in magnitude as they come closer.
3. A: Their repulsion indicates the facing magnetic poles are the same (like poles repel), which says nothing about electric charge.
4. A: Coulomb's law states the electrostatic force between two point charges is F = k q1 q2 / r^2, directed along the line joining them and proportional to the product of the charges and inversely proportional to the square of their separation.