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Thursday, December 15, 2011

Second-Class Levers

Levers of the second class have the fulcrum at one end, the load in the middle, and the effort exerted (up) at the other end, like the picture shown here. A good example of a second-class lever is a wheelbarrow. The wheel in front is the fulcrum. The load (whatever you are carrying) goes in the middle, and you lift the load by pulling up on the handles.

Have you ever given a friend a ride in a wheelbarrow? You probably couldn't lift him or her and carry him all around the yard, but it's easy to do with the right equipment!

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