Description 1. The Secret Weapon Appears • 15 #Motion #State of Motion #Speed - Amy's Textbook Plus: Let's Figure Out Who's Faster! • 49 - Heunhan Playground: Fish Go Blub, Ducks Go Quack • 50 2. There's No Beating Them Easily • 51 #Force #Net Force #Combined Forces #Force Equilibrium - Amy's Textbook Plus: You Need Force Even When Standing Still • 89 - Heunhan Playground: Heave-Ho Tug of War Battle • 90 3. The Ultimate Family Showdown • 91 #Uniform Motion #Accelerated Motion #Free Fall - Amy's Textbook Plus: Let's Learn About Uniformly Accelerated Motion • 131 - Heunhan Playground: Which Button Will You Press? • 132 4. Dodgeball King Eddeum • 133 #Potential Energy #Kinetic Energy #Momentum #Impulse - Amy's Textbook Plus: Work Becomes Energy, Energy Becomes Work • 173 - Heunhan Playground: Roll the Ball, Roll Your Mind Too • 174 Answers • 176 Glossary • 177 Index • 178