Exercises: Coulomb's Law

Work through each section in order. Use $k = 9 \times 10^9$ N·m²/C² throughout. Show your work on all calculation problems.

Grade 11·20 problems·~35 min·OpenStax Physics (High School)·section·sec-18-2

Work through problems with immediate feedback

Warm-Up: Prerequisite Review

These questions review concepts needed for this section.

Which feature do Coulomb's Law and Newton's Law of Gravitation share?

Both forces can only be attractive.

Both forces follow an inverse-square relationship with distance.

Both use the same constant ( $k = G$ ).

Both forces are equal in magnitude for the same pair of objects.