60 = 8.85 x 10-12 _" . 1 = 9X 109 Mm; C2 ;F = 190.F. 1 4. 1 2qd 1 qd Nm2' 4TEO 4760 72 dipole 4 TCEQ 73' e = 1.6 x 10-19 C 2. (20) Consider the diagram below of the following situation: There are three charges on a wire along the x-axis. The outer charges are fixed and the middle one is free to move. The middle object is at equilibrium in the location shown. A) Draw a free body diagram of the middle object. B) What condition is necessary for object q to be in equilibrium (at rest)? C) What is the charge (and type of charge) on the object Q2? D) For the equilibrium to be stable (if the object is displaced from its equilibrium location it will return to that location) what condition must also be satisfied? Q1 Q2 Q1 = 9MC; Q2 = ? Q3 = ? 3d 2d