simple machines

"Is it easier to move produce with a lever or a wheel and axle? Readers will learn about how simple machines work in this book for early readers."--.

"Rolling Along explores the benefits and uses of the wheel and axle. RobbO and RobbEE build a cart to make it easier to move a heavy load, and learn how the wheel and axle are also used for lifting and turning."--Provided by publisher.

Text and pictures introduce the lever, a simple machine used to change force and motion.

Presents a children's book for early readers that describes how different machines are used to make work much easier.

Text and pictures introduce the pulley, a simple machine used primarily to lift heavy objects.

Identifying machines and processes that are initiated by pressing a button.

Many machines found in construction help people do work. The six simple machines all change how forces act.

Describes wheels and axles, including the history, function, and everyday uses.

Describes wedges, including the history, function, and everyday uses.

Describes screws, including the history, function, and everyday uses.