Question

both parts please

Review Two small plastic spheres each have a mass of 1.4 g and a charge of -55.0 nC. They are placed 2.8 cm apart (center to center). What is the magnitude of the electric force on each sphere? Express your answer to two significant figures and include the appropriate units. rValue Units Submit Request Answer Part B By what facs the electric force on a spherelagethan its weight? Express your answer using two significant figures. rig Submit

Answer 1

Since, the spheres are is mall so we can way that they are point charges. Now, magnitude of Force = 1/4 pi epsilon_0 q_1 q_2/r^2 [q_1 = q_2 = -55 nc] 9 times 10&9 times (-55 times 10^-9)^2/(0.028)^2 = 0.035 N factor = f/mg = 0.035/1.4 times 10^-3 kg times 9.8 m/s^2 factor = 2.55