Simple machines - Inclined plane, screws, wedges
Archimedes screw - Screw is a inclined plane wound around Staircase is a inclined plane Wedges, arrows, axe, knife - all are inclined planes, and some combined together and each inclined plane in opposite directions Based on the angle the inclined planes distance and efficiency can be manipulated Screw is a inclined plane wound around and nail in a 3D wedge