We can define a lever as a simple type machine whose purpose is to transmit force and displacement, in this sense, this becomes its main function. It is basically composed of a rigid rod that is able to rotate freely near a fulcrum that is generally called the fulcrum.
This tool is commonly used to amplify or increase a certain mechanical force that is applied to a specific object in order to increase either the distance or the speed it travels. This is generated in response to the application of a force.
This tool has its origin in the prehistoric era among the daily lives of the inhabitants of the time. Its use dates even from before Christ to the present day.
Second degree levers
This type of lever is known thanks to the fact that its resistance is located between the fulcrum and the power, in this sense, its power will always be less than its resistance thanks to the decrease in the speed that is transmitted and the distance that is traveled by the resistance .
This lever model allows or facilitates the location of a specific load between the fulcrum and the generated effort , thus achieving that its power is largely proportional to its resistance and consequently the effort used is less than the determined load. In this sense, it is important to point out that with this type of lever the mechanical gain is always noticeable.It is for the above described that both resistance and power movements are always carried out in an equal sense or, however, the load will always be displaced less than the power, thus being an assembly that manages to attenuate the movement that is generated from the power. power.
Examples of second degree levers
- Second degree levers
- Manual nutcracker
- Nail clipper