Mechanical Advantage

doryOars are levers!

The shanteyman will demonstrate a couple of the simple machines including the pulley (block-and-tackle) and lever. We will identify and discuss the examples of simple machines in your school such as ramps, levers, wheels-and-axles and screws.

Sailors relied on the mechanical advantage provided by simple machines. The six simple machines include:

  • Wheel-and-axle
  • Screw
  • Pulley
  • Inclined plane
  • Wedge
  • Lever

inclined_plane_(psf)-13EC88D4B743616E085Ramps are inclined planes!


Pulleys make it easier to pick up heavy things using a rope.

wedgeWedges are used to split material or widen pegs and pins.


A capstan is an example of the wheel-and-axle.

screw auger

An auger is a screw that bores into wood.