Final answer:
The description provided exemplifies Newton's third law, where action and reaction forces result in motion, such as in walking, swimming, driving a car, or launching a rocket. Two individuals pushing against each other and moving in opposite directions serve as a practical example of this fundamental physics principle.
Step-by-step explanation:
The scenario described involves Newton's third law, which states that for every action, there is an equal and opposite reaction. This is observed when one person pushes against another; they both exert forces on each other, and depending on their relative strengths and masses, one may move forward while the other moves backward. This law is fundamental to understanding how forces work in interactions and can be seen in everyday life, like when a person walks or a swimmer pushes off from the side of a pool.
More complex examples include a car accelerating due to the ground pushing forward on its wheels because the wheels push backward, or a rocket generating thrust by expelling gas backward to move forward. These illustrations exemplify how motion is the result of forces acting in various systems, whether it's humans, vehicles, or other objects in motion.