Question

FOR PART A. PLEASE ANSWER THE QUESTION FULLY USING A NET FORCE DIAGRAM!

The Answer for part D should be: 4.9 nC

PLEASE ANSWER ALL PARTS WITH COMPLETE WORK!

Eis.10 Two small spheres with mass m are suspended with insulating threads of length L from a common point. When the spheres are uncharged, they hang so they touch each other, but when they are both given the same charge q, they repel each other and hang a distance d apart, as shown in figure E1.11. Assume that d is pretty small compared to L but large compared to the diameter of the balls. (a) Explain using a net-force diagram why the magnitude of the electrostatic force F acting on either ball must be (E1.8) (b) Explain why in this situation we can approxi- mate an od (E1.9) By what percent is this expression in error if d what percent is L/10? (c) Combine the answers to parts (a) and (b) with Coulomb's law to show that mgd 2kL (E1.10) (d) If this situation is demonstrated in your class, use the measured values of L, m, and d to esti- mate q. Otherwise, calculate q assuming that 70 cm, d = 4.0 cm, and m =0.4 g. Figure E1.11 The situation dis- cussed in problem E1S.10.

Answer 1