What does the unit "Joule" represent?

The unit "Joule" represents the quantity of work done when a force of one newton is applied over a distance of one meter in the direction of the force. In physics, work and energy are closely related, and the joule can also be used to express energy. Thus, when work is done, energy is transferred, leading to the relationship where they can be used interchangeably in many contexts.

For example, if a person lifts an object against gravity, the work done in lifting that object is measured in joules, as is the gravitational potential energy acquired by the object. Hence, using the joule as a unit reflects both the concepts of work done and energy utilized, confirming that the chosen answer correctly identifies the role of the joule in these physical principles.