I understand that objects of different masses will accelerate equally in a vacuum. This is because the force of acceleration from gravity is the same regardless of mass. I also know I can manipulate the F=ma equation to a=f/m, which also shows the above to the true. Intuitively, though, I have trouble reconciling this with the notion of gravity "causing" the items to have different masses when sitting still. I was wondering if anyone had a plain-English explanation. Thank you for considering my question.