In physics, what is 'work' defined as?

Work in physics is specifically defined as the product of the force applied to an object and the distance over which that force is applied in the direction of the force. This relationship can be mathematically represented as work = force × distance. For work to be done, both a force must be applied, and the object must move in the direction of that force.

The other options do not encapsulate the definition of work in the context of physics. The second option refers to energy but does not specify the relationship to force and distance. The third option describes a change in temperature, which relates to thermal energy but not to the mechanical concept of work. The fourth option regarding time measures duration and does not address the interaction between force and movement necessary for defining work. Thus, the definition highlighting force applied over a distance is the accurate representation of work in the realm of physics.