ACTION Travel The most exciting ways to travel around our planet and the science that lets us Gerry Bailey Felicia Law Illustrations by Iralu
RV-Recreation Vehicle Motorbike Ferris wheel Bullet train Trolley car Hydrofoil Light aircraft Ocean liner Funicular Hovercraft Airbus Bicycle Boat Bus Canoe Car ACTION Contents GRAVITY AIR PRESSURE WING SHAPE GEARS buoyancy CENTer OF GRAVITY LEVER COMBUSTION ENGINE aluminum FRICTION WHEEL AND AXLE streamlining rails DRAG PROPELLERS AZIMUTH POD 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34
3 Scooter Segway Cable car Subway Glossary Index Credits GYROSCOPE SENSORS PULLEY ELECTRIC motor Lots of different kinds of machines are used to help people travel from one place to another And these machines operate on land sea and in the air They may carry just a single person on a motorcycle or thousands of people on an ocean liner Travel machines do a lot of work Work is what happens when a force moves something And to do this work machines need energy This may be electrical energy or chemical energy from fossil fuels such as gasoline And energy provides power This power can be small enough to paddle a boat or massive enough to move a huge airplane Now let’s look at some of the action machines that help us travel from place to place and the science that makes this possible 36 38 40 42 44 46 48
