The physics of charges at rest. Coulomb's law governs the force between charges, electric fields describe the influence a charge has on the space around it, and electric potential energy and potential let you track energy without dealing with forces and vectors directly.
Six ways to master Unit 2 — pick whichever fits how you like to study.
Seven topics from the College Board CED, in order.
Unit 2 builds the electrostatics foundation for the rest of AP Physics 2. You'll learn how Coulomb's law describes the force between any two charges — strikingly similar in form to Newton's law of gravitation — and how that force gives rise to an electric field that fills the space around any charge, ready to push or pull on whatever charge enters it.
This unit ties with Unit 1 and Unit 3 as the highest-weighted unit on the exam at roughly 15–18% of the AP Physics 2 exam. Everything in Unit 3 (circuits) depends on the potential and energy concepts introduced here.
Note: the College Board's revised Course and Exam Description numbers the AP Physics 2 units 9–15, continuing from AP Physics 1's units 1–8 — so this unit appears there as Unit 10: Electric Force, Field, and Potential, with topics 10.1–10.7. We number it Unit 2 since it's the second unit of the Physics 2 course.