What is a lever?
is a simple machine consisting of a bar that pivots on a fulcrum.
What is the point?
serves to easily move loads by increasing the strength or power. The levers also amplify the movement.
What are its components?
Barra, fulcrum, and load power
In what types are there?
In first grade, second grade and third grade.
What is the difference between the different types?
In first grade : The fulcrum is between the power and load.
The object is the load weight, and counterweights to balance the force carried out the mechanism. Both weights are equal and are at the same distance.
In second grade : The fulcrum is at one end and the power and
load the other.
By raising the poles is possible to lift a heavy load that is closer to the fulcrum, the wheel.
In third grade : The power is between the fulcrum and load.
A pair of tweezers is a third grade composite handle. The effort exerted by the fingers is reduced at the ends of the clamp, which allows you to take aim
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