Explains how simple machines, such as levers, pulleys, wheels and axles, and inclined planes, work together to make tasks easier by trading force for distance or vice versa. It illustrates the concept ...

Discusses the principles of levers, a type of simple machine that helps lift heavy loads by changing the direction or magnitude of force applied. It explains how the position of the fulcrum affects ...

A lever is a simple mechanism that uses a bar to pivot ... Linkages are found in many different machines, including folding chairs, windscreen wipers and the arm of a digger.