Hi everyone I'm kinda new here, your support will really be appreciated ! :D 1. The problem statement, all variables and given/known data Let's say the cylinder has radius R, and height T. 2. Relevant equations U = ∫GmdM/x 3. The attempt at a solution My attempt is shown in the picture, I took a tiny element of the cylinder with vertical distance y, and horizontal distance r from the particle, then I used integral. am I doing this right ? I think there's something odd with the "y" there. Should I range the y until the upper surface of the cylinder only?