What is the essence of the work-energy theorem?

The work-energy theorem is a fundamental principle in physics that states the work done on an object is equal to the change in its kinetic energy. This means that when a net force acts on an object and it moves, the energy transferred to the object through work will result in a change in its speed, which is reflected in its kinetic energy.

For example, if you push a stationary object and it starts moving, the work you do is converted into kinetic energy, causing the object to accelerate. This relationship allows us to predict how much an object's speed will change based on the amount of work applied.

Understanding the work-energy theorem is crucial for analyzing motion and energy transfer in various physical systems, making the concept applicable in fields such as engineering, mechanics, and physics-based problem-solving. The other options do not accurately represent the relationship described by the work-energy theorem, where the focus is specifically on the connection between work and changes in kinetic energy.