axles

"Is it easier to lift toys with a wheel and axle or a wedge? Readers will learn about how simple machines work in this book for early readers"--Provided by publisher.

Simple text and color photographs depict examples of wheels and axles in daily life and how they work.

"A hands-on approach introduces young scientists to wheels and axles. Science theory and practical, fun projects teach the physics and the technology behind this simple machine. Important science curriculum is explained through historical and contemporary examples of wheels and axles. Step-by-step projects range from the simple to the more challenging"--Provided by publisher.

Provides an introduction to wheels and axles, examining how they work, different types, and includes experiments using wheels and axles.

"'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.

Photographs and simple text in both English and Spanish describe how wheels and axles work in simple machines.

Photographs, diagrams, and simple text describes how wheels and axles work.

This book uses everyday examples to show how wheels and axles are simple machines that make carrying, pushing, and mixing easier.

Describes work, machines, friction, wheels and axles, and gears in everyday surroundings, and presents experiments that explain how they work.

Discusses wheels and axles and the ways in which they are used.