10. A small ball weighing 0.2 g, having a charge of 5 ∙ 10−7 C, suspended on a thin and inextensible thread. At what distance do you need to bring the second body from below with a charge of the same name 2 ∙ 10−7 C so that the thread tension decreases by a factor of three?

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