Gravitational "lines of force" for two equal point masses? 1. The problem statement, all variables and given/known data "Sketch the gravitational "lines of forces" for two equal point masses. These are isomorphic to the electrostatic lines of force of A. Two equal "+" point charges. B. No pair of point charges separated by the same distance. C. Two equal "-" point charges." 2. Relevant equations None; E= F/Q; E=KQ/X^2 3. The attempt at a solution My only question is wouldnt two "+" point charges and two "-" point charges have the same electric field line diagram?