Types of Levers - Simple Machines for Kids - What are levers?
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Types of Levers

Seesaw

There are three different kinds of levers.

A first-class lever is a stick where the fulcrum is between the weight and the energy moving the weight (your hands, for example). Some common first-class levers are see-saws, crowbars, pliers, scissors (which use two first-class levers together), and a hammer pulling a nail.

Wheelbarrow

A second-class lever is a stick where the fulcrum is at one end of the stick, you push on the other end, and the weight is in the middle of the stick. Some common second-class levers are doors, staplers, wheelbarrows, and can openers.

Baseball bat

A third-class lever is a stick where the fulcrum is at one end of the stick, you push on the middle, and the weight is at the other end of the stick. With a third-class lever, you have to put in more energy than you would just lifting the weight, but you get the weight to move a longer distance in return. Some common examples are a broom, a hoe, a fishing rod, a baseball bat, and our own human arms.

To find out more about simple machines, check out these books and games from Amazon.com or from your library:

Machines
Physics
Chemistry
Biology
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Copyright 2012-2014 Karen Carr, Portland State University. This page last updated 2014. Powered by Dewahost.
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