Solving a problem in physics section 71 point 59 electr

Solving a problem in physics section 71 point 59 electr

59. Two positive charges of 10 nC each are located at a distance of r1 = 0.25 m from each other, what work must be done to bring them closer to a distance of r2 = 0.2 m?

Additional information:

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