Final answer:
Two cars colliding head-on and exerting equal and opposite forces on each other is an example of Newton's 3rd Law.
Step-by-step explanation:
This is an example of Newton's 3rd Law. Newton's 3rd Law states that for every action, there is an equal and opposite reaction. In the scenario of two cars colliding head-on, the force the first car exerts on the second is equal in magnitude but opposite in direction to the force the second car exerts on the first.
Learn more about Newton's 3rd Law