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 ...

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 ...

When we think of machines, the likes of robots, appliances and manufacturing equipment come to mind, but scientists also classify such common objects as the screw, the lever, the wedge and the wheel ...