Class 2 lever
Try lifting at different distances from the stone. What do you feel? What happens if you're closer or farther away?
The longer the lever you use, the less force you need!
In everyday life, for example, you come across class two levers when using a garlic press, wheelbarrow, tweezers, hammers and various types of spanners such as socket head spanners or adjusting spanners.
All levers have a point that stands still. With a class two lever, one end is fixed at the turning point (fulcrum). Torque, which is a measure of a force's ability to turn an object around a specific point, depends on the lever. The longer the lever , the less force you need to use. If you compare lifting the stone by holding the end of the lever and in the middle of the lever, you need to use half as much power at the end.
The lever is one of the five simple machines: tilting plane, screw, wedge, lever and wheel. Sometimes the block and tackle are also counted as a simple machine. The simple machines have been given their collective name because they only require a single force to perform a mechanical job. All simple machines work according to the golden rule of mechanics: What you gain in force, you lose in distance. And vice versa.
The simple machines are probably some of the earliest inventions used by man. The first person to document the simple machines was Archimedes (287 BC–212 BC).