Newton's third law of motion states that for every action, there is an equal and opposite reaction. This means that if an object exerts a force on another object, then the second object exerts a force of equal magnitude but in the opposite direction on the first object. This law applies to all objects and all interactions, and it helps explain how forces work in pairs. For example, if you push a wall, the wall pushes back on you with the same amount of force.
