How is motion best defined in physics?

Motion in physics is best defined as a change in position of an object. This definition captures the essence of what motion represents in terms of physical phenomena. When an object is in motion, it is moving from one location to another, which can be quantified and measured through various parameters like displacement, velocity, and acceleration.

The concept of motion involves the relationship between an object and its environment; it is not merely the act of being at rest, nor can it be accurately described as the force acting on an object or the energy that object utilizes. Force and energy are important concepts in physics, but they describe different aspects of physical interactions rather than motion itself. Thus, the accurate and comprehensive definition of motion relates directly to the changing position of an object over time.