A wedge is really an inclined plane adapted to different applications. The mechanical advantage comes from the ratio of the length to the slope. A more “keen” or sharp wedge will offer more mechanical advantage. As with the inclined plane, the tradeoff is between the distance moved and the height gained.
![](https://engineeringtechnology.org/wp-content/uploads/2023/02/MA-Wedge-744x600.png)
When the wedge is pushed or driven into a narrow space, it creates a force that is perpendicular to the inclined surface of the wedge. This force is greater than the input force applied to the wedge, providing a mechanical advantage. The mechanical advantage of a wedge is calculated by dividing the length of the sloping side of the wedge by its thickness. The longer and thinner the wedge, the greater the mechanical advantage it provides.