일반물리학 2 — Coulomb's Law: Problem 15

15 In Fig. 21-14a, particles 1 and 2 have charge \(20.0 \mu\text{C}\) each and are held at separation distance \(d = 0.75 \text{ m}\). (a) What is the magnitude of the electrostatic force on particle 1 due to particle 2? In Fig. 21-14b, particle 3 of charge \(20.0 \mu\text{C}\) is positioned so as to complete an equilateral triangle. (b) What is the magnitude of the net electrostatic force on particle 1 due to particles 2 and 3?