What Is Friction?

What Is Friction? book cover — CONTENTS Friction Is Everywhere Look closely Friction Is Useful Friction Is Fun IO I2 14 16 Friction Can Increase safety Not All Friction Is the same Another Type of Friction Just How Much Too Much Friction Can Cause Problems Too Little Friction can 18 20 Cause Problems 22 Friction in Nature 24 26 28 Friction's Special Effects Friction’s Effects Are All Around Glossary For More Information 30 31 Index 32

What Is Friction? — page 1 — FRICTION Is EVERYWHERE Friction is everywhere It is a force a push or pull that acts between two objects that are touching one another Friction slows or stops the movement between the surfaces of the objects that are touching 1E liding over snow is possible because wax on the skis reduces friction between the skis and the

What Is Friction? — page 2 — THINK ABOUT IT Friction occurs between all types of matter Name two solids a solid and a liquid or a solid and a gas How could they come into contact Friction can occur between all types of matter solids liquids and gases Sometimes it can be useful At other times it can cause problems All around us at home at school at work and at play we encounter friction in our lives every day a A parachute creates friction with air to slow a

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