1. The problem statement, all variables and given/known data Given a situation like this: Where the two blocks are perfectly conducting materials and are touching, will they separate? If they do separate, will they have the net charge values you calculate in the initial setup using Gauss's Law? There are no numbers, it's just conceptual. 2. Relevant equations Gauss' Law 3. The attempt at a solution I start by treating the two touching blocks as a single rectangular conductor. Then negative charge will accumulate at the top end, and positive at the bottom, and can calculate how much using Gauss's Law. So the two blocks should have a net charge and given that they have a net charge, I figure they should both have a net force on them due to the electric field. I know that there will also be interplay between the accumulated charges (the two ends will attract each other), but for this case assume the heights of the blocks are long enough so that the electric field strength is much stronger than the electric field due to the accumulated charges at each end. Is this correct, or am I missing something?