Levers

First order

The most simplest of machines is the common lever. A simple log can act to magnify forces and shift objects heavier than the person holding the log. All levers have a fulcrum (turning point), effort (the force provided to do the work) and the load (the force we are pushing against).There are three classes of levers, first order, second order and third order. They differ in the position of the fulcrum, load and effort. Let's see a first order lever.

First order levers have the turning point(fulcrum) between the load and the effort.

A well known first order lever is the see-saw.

 

A pair of wire cutters is an example of two first order levers working together.

A screw driver used to open a can of paint acts as a first order lever.

Can you identify the fulcrum, effort and load?

Solution

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