Final answer:
The IMA of a machine, which operates with a lever and wedge mechanism, increases for the wedge as the blade's thickness decreases relative to its length.
Step-by-step explanation:
The machine in question is operating on the principles of simple machines, specifically a lever and a wedge. The Ideal Mechanical Advantage (IMA) of a lever is calculated by the ratio of the length of the handle to the length of the blade, with the fulcrum. Similarly, the IMA of a wedge is determined by the ratio of the length of the blade to its width. In this case, as the thickness of the blade decreases relative to its length, the IMA of the wedge increases because it requires less effort to push the wedge into a material.