I took a practice Ap Physics test today and did well, but there was a basic problem that hung me up: there are two boxes on the ground on top of each other. the top box's mass is 2m, and the bottom's is 1m. question: just looking at the bottoms box's normal force, does it equal the 2m box on top? i've learned newton's laws but im really rusty and i understand that if the boxes were switched around, the bottom box (now 2m) would have a normal force of 1mG. , enough to support the top box. but, given the original problem's circumstance, i dont believe that a lighter box on the bottom can apply a normal force to support the top box, without the ground's support: the 1m box on bottom does not have a normal force equal to the top box, 2m. this seems to conflict newton's laws, so i need help realizing if im on the right track or not with this problem.