Final answer:
The work done when one pound of force is applied to move an object a distance of one foot is 1 foot-pound (ft. lb).
Step-by-step explanation:
When one pound of force is applied to move an object a distance of one foot, the amount of work done is calculated by multiplying the force by the distance moved in the direction of the force. Since work is force times distance, and both the force and distance are given in the traditional English units of measure, the work done in this case is 1 foot-pound (ft. lb). This can be seen as a direct application of the definition of work, which in physics is the product of force and displacement in the direction of the force.