* Work and Force: Work is done when a force causes an object to move a certain distance.

* Constant Height: In this scenario, the object is held at a constant height. This means it's not moving vertically.

* No Displacement: Since there's no vertical movement, there's no displacement.

* Zero Work: Without displacement, the force you exert to hold the object up does no work.

Important Note: While you're applying a force to counter gravity, and you're expending energy, that energy is going towards maintaining the object's position, not causing it to move.