wheels

Discusses wheels and axles and the ways in which they are used.

An introduction to wheels and axles, explaining what they are, and looking at examples of how they are used.

Looks at wheels as simple machines, discusses the need for an axle to make wheels work effectively, examines the mechanical advantages of using wheels, explains the concept of friction, and describes various wheeled machines.

An anthology of contemporary poems by a variety of authors about wheels and vehicles that roll.

An introduction to wheels and axles that describes their parts, functions, uses, and history.

Explains the concepts of work and friction; describes machines, wheels, and axles; and includes simple experiments.

Examines how the wheel has been used through history and how it is being used today.

Labeled pictures of cars, trains, trucks, baby carriage, and other vehicles and objects and articles relating to them.

A pictorial representation of the development and uses of the wheel since prehistoric times.