What do you call a spiral inclined plane?

A spiral inclined plane is referred to as a screw because it consists of a helical ridge that wraps around a cylindrical shaft. This design allows for continuous mechanical advantage when a force is applied parallel to the axis of the screw. As the screw is turned, it converts rotational motion into linear motion, effectively pulling an object upwards or driving it into a material.

The unique structure of a screw, which integrates both the properties of inclined planes and circular motion, makes it an essential component in various tools and machines, enhancing its function in fastening or lifting tasks. Understanding this concept is crucial in the study of simple machines and their applications in engineering and mechanics.