When I exert a force, I will experience an equal and opposite force on two mutual bodies. However, when I break through a wall how do the free body diagrams of my hand and the wall? When the wall doesn't break, the forces on the hand is normal contact force on my hand from the wall and a force pushing it to make it stay st that position. As for the wall, its a force that I exact on it by my hand and also a force to balance the exerted force on the wall. But when dealing with the breaking wall case, I'm unsure what happens. Thanks for all the help!