To illustrate the work-energy concept, consider the case of a stone falling from xi to xf under the influence of gravity. using the work-energy concept, we say that work is done by the gravitational resulting in an increase of the energy of the stone.

Force, kinetic.

Explanation:

To illustrate the work-energy concept, consider the case of a stone falling from xi to xf under the influence of gravity. Using the work-energy concept, we say that work is done by the gravitational force, resulting in an increase of the kinetic energy of the stone.

Gravitational force is the natural phenomenom that makes objects with mass pull to one another. An easy example is an object falling to the ground.

Kinetic energy is the energy that an object owns because of its own motion. Example: When we're driving and the car stops, our bodies are still moving. That's why we must use security belts, in order to prevent accidents.

answer; generalizability;