Levers
A Lever Makes work easier because you don't pull the load, you push on the other end of the load.
Parts of a lever: Load- the thing that you are trying to lift, Fulcrum- the thing that the lever arm pivots on, Lever Arm- the bar that you apply effort on, Effot- the place that you push on.
Levers give you an advantage because you do not have to lift the load.
Examples:
bottle opener,
arm,
paddle,
broom,
fishing rod,
nail clippers,
sling,
spoon,
and much more!!!
Dictionary Definition: a rigid bar that pivots about one point and that is used to move an object at a second point by a force applied at a third.
http://dictionary.reference.com/browse/Lever
http://www.fi.edu/pieces/knox/automaton/lever.htm
ttp://www.enchantedlearning.com/physics/machines/Levers.shtml