The work done in raising a box depends on the height to which it is lifted and not on the speed at which it is raised. Work is defined as the product of the force applied to move an object and the distance over which it moves in the direction of that force. The force required to lift the box is the weight of the box, and the distance is the height it is raised. Therefore, no matter how fast you raise it, the work done remains the same as long as the final height is the same, because work is dependent only on the force and vertical distance traveled, not the speed or path taken.