1. The problem statement, all variables and given/known data (This was a problem in an examination test of physics) Problem: point 1) Make an example of conservative force; point 2) Write the vectorial expression point 3) Choose a coordinate system and find the expression of the potential energy in a generic point in the space 2. Relevant equations I know how to do the first two points but i can't understand what he's asking me in the third point, when he asks me about the "generic point in the space". How should i Proceed? What is he asking me ? 3. The attempt at a solution point 1) I made the example of "Costant force" point 2) U=Fx point 3) I got no idea what he's asking me. Can you help me please?