LEVERS By: Emma S, Jake A, Thomas A All about levers  A lever is a simple machine that allows you to gain a mechanical advantage in moving an object.

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LEVERS By: Emma S, Jake A, Thomas A

All about levers  A lever is a simple machine that allows you to gain a mechanical advantage in moving an object or in applying a force to an object. It is considered a "pure" simple machine because friction is not a factor to overcome, as in other simple machines. A lever consists of a fulcrum, applied force and load.

Three common types of levers  There are three common types or classes of levers, depending on where the fulcrum and applied force is located. The mechanical advantage is that you can move a heavy object using less force than the weight of the object, you can propel an object faster by applying a force at a slower speed, or you can move an object further than the distance you apply to the lever. Example-

Photos of different levers

more photos…

Comprehension questions  What are the parts of a lever?  What are the three lever classes?  What are the uses for a lever?