Forces and Motion Science Fair Projects, Revised and Expanded Using the Scientific Method

Forces and Motion Science Fair Projects, Revised and Expanded Using the Scientific Method



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Forces and Motion Science Fair Projects, Revised and Expanded Using the Scientific Method by Robert Gardner, Tom LaBaff, Stephanie LaBaff

How can you tell if a moving object is accelerating? Why are pulleys used to lift objects? Can you observe weightlessness in everyday situations? Using easy-to-find materials and the scientific method, you can learn the answers to these questions and more. If you are interested in competing in science fairs, the book contains lots of great suggestions and ideas for further experiments.

Product Details

ISBN-13: 9780766034150
Publisher: Enslow Publishers, Incorporated
Publication date: 04/01/2010
Series: Physics Science Projects Using the Scientific Method Series
Edition description: Revised
Pages: 160
Product dimensions: 6.88(w) x 9.50(h) x 0.51(d)
Age Range: 10 - 13 Years

Table of Contents

Introduction: Forces and Motion Experiments and Projects Using the Scientific Method 7

How Scientists Search for Answers 10

Using the Scientific Method in Experiments and Projects 12

Science Fairs 20

Safety First 23

1 Motion: Measuring Distance and Time 25

1.1 Calculating Walking Speed from Distance and Time 26

1.2 Measuring the Speed of Sound 31

1.3 Making Velocity-Time Graphs from Distance-Time Graphs 36

1.4 Accelerated Motion: When Velocity Changes 40

2 Forces and Motion 45

2.1 Testing Newton's First Law 46

2.2 Friction and Newton's First Law 52

2.3 Detecting Acceleration 60

2.4 Testing Newton's Second Law of Motion 63

2.5 Galileo's Investigation of Acceleration Due to Gravity 67

2.6 Testing Newton's Third Law of Motion 72

3 Pendulums and Springs: Oscillating Motion 79

3.1 Pendulums Move Back and Forth 80

3.2 Pendulums of Different Lengths 86

3.3 Springs, Forces, and Stretches 90

3.4 Springs, Masses, and Time 94

4 Motions That Curve or Circle 99

4.1 The Forces on a Pendulum Bob 100

4.2 Projectiles Launched Horizontally Near Earth's Surface 104

4.3 Your Bike and a Water Balloon Projectile 109

4.4 Projectiles Launched at Upward Angles Near Earth's Surface 111

4.5 Circular Motion, Newton, and Forces 113

4.6 A Circling Satellite 118

4.7 Weightlessness on an Orbiting Satellite or Spaceship 121

5 Forces, Machines, and Muscles 127

5.1 The Lever: A Simple Machine 129

5.2 The Lever as a Sensitive Balance 136

5.3 The Inclined Plane and Work 140

5.4 Work and the Pulley 142

5.5 Muscles and Bones as Levers 145

5.6 Arm Versus Leg Strength 148

5.7 Muscle Pairs 150

5.8 The Body's Center of Mass 152

Appendix: Science Supply Companies 156

Further Reading and Internet Addresses 157

Index 158

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