Solving a problem in physics section 73 point 65 electr

Solving a problem in physics section 73 point 65 electr

65. Three negative charges of 3 ∙ 10–9 C each are located at the vertices of an equilateral triangle. What charge q1 must be placed in the center of the triangle so that the system is in equilibrium?

Additional information:

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)