"For every action there is an equal and opposite reaction." I'm having a difficult time wrapping my head around this. I'm having a hard time applying it to certain situations. For example, a hammer hitting a nail, but more presently a problem in my homework. A building is being torn down. The wrecking ball smashes through a wall. Does the ball put a larger force on the wall than the wall puts on the wrecking ball? Explain your answer. So I understand that as the wrecking ball swings there is Tension force Weight and Drag (as the ball swings) that act on it. For the wall there would be Weight Normal Force Static Friction I guess my big problem, is that if a wrecking ball smashes through a wall and they exert the same amount of force on each other, how would the ball go through the wall? Is it simply because the wrecking balls surface area is smaller?