[1'] The following problems consider the scalar form of Coulomb's law, which describes the electrostatic force between two point charges, such as electrons. It is given by the equation F (r) = ke \"32' , where ke is Coulomb's constant, q, are the magnitudes of the charges of the two particles, and r is the distance between the two particles. 168. To simplify the calculation of a model with many interacting particles, after some threshold value 1' = R, we approximate F as zero. a. Explain the physical reasoning behind this assumption. b. What is the force equation? 0. Evaluate the force F using both Coulomb's law and our approximation, assuming two protons with a charge magnitude of 1.6022 X 1019 coulombs (C), and the Coulomb constant Ice = 8.988 X 109Nm2/C2 are1 m apart. Also, assume R