Solving a problem in physics section 74 point 3 electr

Solving a problem in physics section 74 point 3 electr

3. A 150-mg ball suspended on a thin non-conductive filament has a charge of 10 nC. At a distance of 32 cm from the bottom, a second charged ball is placed below it. What should be the charge of this ball so that the tension force of the thread a) is halved; b) doubled?

Additional information:

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