Which law describes that no isolated forces exist in the universe?

The concept that no isolated forces exist in the universe is best represented by Newton's Third Law, which states that for every action, there is an equal and opposite reaction. This law emphasizes the interconnectedness of forces, indicating that forces always occur in pairs. When one object exerts a force on another, the second object simultaneously exerts a force of equal magnitude and in the opposite direction on the first object.

This principle suggests that forces must always occur in interaction; there are no isolated or standalone forces because any force experienced by an object must be balanced by a corresponding force acting upon it from another object. Therefore, it illustrates that the universe's behavior is governed by mutual interactions rather than isolated occurrences.

In contrast, Newton's First Law deals with the inertia of objects at rest or in motion, while Newton's Second Law describes the relationship between force, mass, and acceleration, primarily focusing on how forces affect the motion of objects. Galileo's Law relates to the motion of objects and their behavior under gravity but does not specifically address the nature of forces in the interconnected context proposed by Newton's Third Law.