Screw

A bar that has inclined plane wrapped around it

definition:

A screw is a bar that has inclined plane wrapped around it.

How screws help

The inclined plane lifts the soil,imagine a spiral stairway in a light house.The stairs go around ,just like the inclined plane on this auger.you start at the bottom and the stairway ,the inclined plane,lifts you upward.

This screw is is holding the block of wood together.