Question

20าร 4 Short Answer Question 18.2 21 of 30 2058 at Part A 2018 ar so As nalmotal sphere of mass3.8 g and charge 5ucis feed with an intal speedof29꺄 heitytowad he ieofasend metal sch mayng chage 4nenswond ghen ihed tedn spheres are initially a large diatance apart, how close do they get to each other? Treat he spheres as pont chares 2018 at 9a Express your answer using two significant figures day at 130 2018 as 2018 at to 2019 at 2 2019 at so 2018 a 2018 at Submit Request Answer

Answer 1

Initially two spheres were a large distance a part initial electrostatic potential energy of the system, p_i = 0 the 2 nd sphere is held fixed k_i = initial kinetic energy of the system = initial kinetic energy of the firt sphere = 1/2 mv^2 Therefore total initial energy, E_i = (k_i + p_i) - (1/2 mv^2 + 0) if the spheres are at a distance x a part I their closest position and this position to treated as the final position, the, k_f = final kinetic energy of the system = 0 (as the two sphere are assumed to be at rest) final electrostatic potential energy, p_f = q_1 q_2/4 pi elementof_0 x Therefore total final energy, E_gf = (k_f + p_f) = (0 + q_1 q_2/4 pi elementof_0 x) (q_1 q_2/4 pi elementof_0 x) according to the law of conservation of energy, E_i = E_f rightarrow