An item being lifted by an elevator at a constant speed for a height of me 10ft.
The item being lifted by the elevator is traveling at a constant speed and is raised to a height of 10ft. The elevator is effectively doing work on the item, moving it against gravity. The amount of work done by the elevator is equal to the force applied (the weight of the item) multiplied by the distance it is raised (10ft).
If we assume the item has a weight of 100 pounds, the work done by the elevator would be:
Work = Force x Distance
Work = 100lbs x 10ft
Work = 1000 ft-lbs
Therefore, the elevator does 1000 foot-pounds of work in lifting the item to a height of 10ft.