Elliots intro to 3 classes of levers

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Intro to the3 classes of levers
Elliot's page on leversElliot's class one lever Elliot's class 2 lever Elliot's class 3 levers


  • Their are the classes of levers. the class 1 lever, class 2 lever and class 3 lever.
  • People use levers to make stuff easier to lift.
  • When a load arm is shorter than the effort arm the ideal mechanical advantage will always be more than one.
  • When the fulcrum is in the exact middle between the two arms the ideal mechanical advantage is 1.
  • When the load arm is longer than the effort arm the ideal mechanical advantage is less than one.

Here is a short video about the three classes of levers:



http://www.youtube.com/watch?v=OkQcs5ZBcLQ




Some examples of levers are:

baseball bat.jpg
baseball bat
hockey stick.jpg
hockey stick
teetor totter.jpg
teetor totter
Wheelbarrow.jpg
wheelbarrow


Elliot's page on levers
Elliot's class 1 lever Elliot class 2 lever Elliot's class 3 levers Elliot's references
Feel smart? Take the levers quiz!Elliot's Levers quiz!!!

Elliot's references