Here's why:

* Wedge: A wedge is a simple machine that has a thick end and a thin end. It uses force to separate or split objects by driving the thin end into a material.

* Drawer: Think of a drawer as a wedge that is oriented horizontally. When you pull the drawer, the front face (the thin end) slides along the track, effectively separating the drawer from the cabinet.

While a drawer also involves some aspects of a lever (the drawer handle acts as a lever to apply force), the primary function of the drawer itself is based on the wedge principle.