Hello, I've been trying to figure out the physica behind a collision of two objects due to the force of gravity. Here's the situation as I'm picturing it: A massive object A is falling due to gravity which impacts a stationary object B being held up by a structure. In this particular case, the structure is unable to support the impact force of object A and fails, causing the now combined object AB to continue falling. My difficulty is in picturing how the forces interact during the collision. Object A is falling with a force of F=MaG, which is then applied to Object B. At this instant, object B begins its acceleration... Would a force F be applied, during the collision, to Object A in the opposite direction due to Newtons 3rd law?