Textbook Problem

A In Chapter 23, you will encounter the electric force that exists between two electrically charged objects, given by the formula F_E = kq₁q₂/r², where k is a constant called Coulomb’s constant, each q represents the amount of excess charge on each object, and r is the distance between the objects. Find the change in electric potential energy between two charges that are initially a distance r₁ apart and later a distance r₂ apart.