I understand why a heavy item and a light item both fall a given distance in the same time - in a vacuum, etc. What happens in the case of a cylinder rolling down an inclined plane with no slippage? Would a heavy cylinder reach the bottom at the same time as would a light cylinder? What if the cylinders were of differing radii? What if the cylinders had a differing moment of inertia, e.g., one cylinder with homogeneous density versus another that was of higher density nearer the surface of the cylinder? Thansk for helping me understand.