1. The problem statement, all variables and given/known data One more query.Two identical small bodies each of mass m and charge q are suspended from two strings each of length l from a fixed point.This whole system is taken into an orbiting artificial satellite, then find the tension in the two strings? 2. Relevant equations 3. The attempt at a solution I know in satellite g=0. Therefore there won't be any weight acting downwards only forces which exists between the balls will be Coulombs force of repulsion + mutual gravitational force attraction between bodies + gravitational force of attraction of the satellite on the bodies However, magnitude of above said gravitational forces will be negligible as compared to coulombs force. Hence this coulombs force of repulsion can be considered the only force between the balls which will repel them .But the answer given is T= (1/4πε0)*q^2/4l^2 This suggests r=2l I want to know how to find "r"how r came out to be 2l? probably the following image will suit the situation in the question.