Sensational Science Projects With Simple Machines

by Gardner, Robert; LaBaff, Tom

• ISBN13: 9780766025851
• ISBN10: 0766025853
• Format: Hardcover
• Copyright: 2006-03-01
• Publisher: Enslow Elementary

Summary

How can a 50-pound boy lift a 200-pound man? How does a wheelbarrow work? Is it easier to roll a toy truck up an inclined plane or just pick it straight up? What is an easy way to move a load of bricks? The experiments in this book will show how simple machines work and explain some simple principles of physical science. All you need are some simple materials, most of which can be found around your home, school, or neighborhood. So grab your marbles, wheels, and buckets and discover that physics is fantastic!

Table of Contents

Introduction	p. 4
Force, Friction, Distance, and Work	p. 6
First-Class Levers	p. 10
First-Class Levers: An Explanation	p. 12
Second-Class Levers	p. 14
Second-Class Levers: An Explanation	p. 16
Third-Class Levers	p. 18
Third-Class Levers: An Explanation	p. 20
The Wheel and Axle	p. 22
The Wheel and Axle: An Explanation	p. 24
Wheels, Bearings, and Friction	p. 26
Wheels, Bearings, and Friction: An Explanation	p. 28
Inclined Planes	p. 30
Inclined Planes: An Explanation	p. 32
The Wedge	p. 34
The Wedge: An Explanation	p. 36
The Screw or Bolt	p. 38
The Screw or Bolt: An Explanation	p. 40
Single Pulleys	p. 42
Single Pulleys: An Explanation	p. 44
Words to Know	p. 46
Further Reading and Internet Addresses	p. 47
Index	p. 48
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