We can find levers all around us. Baseball bats, crowbars, seesaws, and wheelbarrows are all examples of levers. The three classes of levers make hard lifting jobs easier with the help of leverage. Each class of lever is set up differently, but has all the same parts. Levers are made up of a plank that pivots at a fulcrum. In this book, readers will learn about the difference between each class of lever, where levers can be found, and how levers make many jobs we do much easier. Provided by publisher.

Includes index.

Learning about levers -- The parts of a lever -- Classes of levers -- The first-class lever -- The second-class lever -- The third-class lever -- Ancient levers -- Modern levers -- Levers for everyday use -- Humans are levers!.