Introduces simple machines, including screws, levers, wedges, and pulleys, describes how each makes everyday life easier, and provides activities demonstrating these machines in action.

Do It Yourself' offers an exciting new approach to understanding and investigation. Each book helps readers conduct their own experiments and activities to learn more about the world around them.

Aiming to bring the fun back into teaching and learning science with things that slide, pivot, turn, rub and work, this book offers help to teachers in presenting scientific principles and simple mechanics through hands-on, co-operative learning activities. Using inexpensive materials (for example, tape and paper clips), students at grades 3-8 should be able to learn to build simple machines, such as levers, pulleys, spring scale, gears, wheels and axles, windmills and wedges. Experimentation with these gadgets demonstrates how things work.

"Simple Machines! introduces kids to the concept of mechanical advantage and harnesses kid-power by inviting them to build machines of their own design. This book also opens eyes and minds to the diversity of machines in their lives, and sparks the imagination with challenge, humor, and achievable projects"--Publisher.

Simple machines are used to overcome forces all the time. Even our arms are lifting machines that overcome the force of gravity. This exciting book teaches readers how to make simple machines and provides them with an excellent understanding of forces, fr

Introduces six simple machines, describing how they work in more complex machinery and how they are used every day.

The military is known for its big, powerful, and complex machinery. This book, however, lays out a number of examples, modern and historic, of how the armed forces use simple machines. A compelling presentation of physical science curriculum points.