Welcome!

Welcome to Dr. B's Science Lab, a non-commercial resource for up-to-date and accurate science content, activities, and projects. Explore a different topic every month, and get the whole family involved in learning and experimenting! Just be sure to follow the directions exactly and pay attention to any safety information given.

If you would like to receive email updates whenever new content is added to Dr. B's Science Lab, submit your address in the "Follow by Email" link at left. Your email address will not be used for any other purpose.



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!

No comments:

Post a Comment