Pulleys - Early Bird Physics Author:Sally M. Walker, Roseann Feldmann How does a pulley work? What is it? Colorful diagrams and fun-to-do experiments help you explore the many ways this simple machine can help make work easier and faster. — Book Features Be a Word Detective • Charts/Graphs/Diagrams • Note to Adults • Full-Color Illustrations • Full-Color Photographs • Furth... more »er Reading • Glossary • Index • Table of Contents • Websites« less