A lever is a machine consisting of a beam or rigid rod pivoted at a fixed hinge, or
fulcrum. .... This allows the identification of three classes of levers by the relative
... in the static analysis...
A lever is one of the simplest mechanical devices. ... First-class levers have the
fulcrum placed between the load and the effort, as in the seesaw, crowbar, and ...
The first class lever is one of three classes of levers and is one possible
arrangement of muscles, bones, and joints found in the human body. While less ...
A first-class lever is a beam, rod or stick with the load at one end, the fulcrum in
the middle and the force applied on the other end. A good example of a first-class
A first-class lever is one in which the fulcrum is located ... Hand trucks are L-
shaped but works on the same principle on ...
These series of levers work together to produce coordinated action, some by ...
Note: shovelling and rowing actions can also be first class lever systems if the ...
Spring http://library.thinkquest.org/J002079F/lever.htm ... By First Class Lever ...
In this simple machine you are making work easier by trading force for distance.
As long as the fulcrum is closer to the output force, first-class levers increase
force. ... Third-class levers do not change the direction of the input force, but they
Work – done when an applied force causes an object to move in the direction of
the force ..... Acts like a first class lever with the fulcrum being located at the axis.
A lever enables people to do work using less force. ... A first-class lever the
fulcrum is located between the force pushing down- the input force-(on a see-saw