This lesson will introduce the six types of simple machines and show how machines can increase efficiency by reducing work input needed. It is 1 of 2 in the series titled "Simple Machines."

An entertaining site that communicates ideas through cartoon drawings. Discover how simple machines and gadgets operate, such as fax machines and washing machines.

This image shows a large gear and a small gear from two different angles. Understanding how gears work is important when learning about mechanical advantage and simple machines.