Levers

What is a lever?

A lever is a simple machine that makes work easier for use; it involves moving a load around a fulcrum using an effort.

There are 3 classes of levers.



In a First Class Lever, the fulcrum is between the effort and the load. The load is larger than the effort, but is moved through a smaller distance.

Eg. see-saw, scissors, pliers, hammer







In a Second Class Lever, the load is between the fulcrum and the effort.

Eg. stapler, bottle opener, nail clipper, wheelbarrow









In a Third Class Lever, the effort is between the fulcrum and the load.

Eg. fishing rod, tweezers, tongs