A) Work Done
* Formula: Work (W) = Force (F) × Distance (d)
* Given:
* Force (F) = 50.0 lb
* Distance (d) = 10.0 ft
* Calculation: W = 50.0 lb × 10.0 ft = 500 ft-lb
Therefore, 500 ft-lb of work was done on the box.
B) Change in Potential Energy
* Concept: Potential energy is the energy an object possesses due to its position. Since the box is moving across a level floor, its height doesn't change.
* Conclusion: There is no change in potential energy because the box's height remains constant.
Key Points:
* Work is done when a force causes an object to move a certain distance.
* Potential energy depends on an object's position relative to a reference point (usually the ground). If the position doesn't change, the potential energy doesn't change.
