Lesson: Coulomb's Law

An object with a charge of 1.20 C is located 4.50 m away from a second object that has a charge of 0.360 C. Find the electrical force that the objects exert on each other. Use N⋅m²/C² for the value of Coulomb’s constant. Answer to three significant figures.

Coulomb’s law defines the electrical force, , that two positively charged objects with the charges and exert on each other. The law relates the force exerted to the distance, , between the objects and to Coulomb’s constant . Which of the following formulas correctly states Coulomb’s law?

An object with a charge of 1.50 C and a second charged object that is 0.125 m away exert a force of N on each other. Find the charge on the second charged object. Use N⋅m²/C² for the value of Coulomb’s constant. Answer to three significant figures.