Which tool utilizes shear force in its operation?

The guillotine is a tool that utilizes shear force in its operation. Shear force occurs when two opposing forces act parallel to each other, causing a deformation or cutting action in materials. The guillotine is designed specifically to cut through materials, such as paper or thin sheet metal, by applying this shear force through a sharp blade that moves downward against a stationary surface. The blade's action effectively slices through the material, demonstrating how shear force is harnessed to achieve a clean cut.

In contrast, other options do not primarily operate based on shear force. The drill uses rotational motion to remove material through cutting, whereas the wrench applies torque to turn nuts and bolts, and the saw primarily operates through a sawing action that involves a reciprocating or rotary motion rather than directly utilizing shear force in the same manner as a guillotine. Thus, the guillotine's specific design and function clearly highlight its reliance on shear force to perform its cutting action effectively.