simple machines

Presents an introduction to ramps and wedges, in simple text with illustrations, describing how these simple machines work in everyday life.

Presents an introduction to pulleys and gears, in simple text with illustrations, describing how these simple machines work in everyday life.

Presents an introduction to levers, in simple text with illustrations, describing how these simple machines work in everyday life.

Introduces the principles of springs as simple machines, using examples from everyday life.

Introduces the principles of screws as simple machines, using examples from everyday life.

Uses a variety of examples, from scissors and axes to zippers and hairpin turns, to demonstrate the power of the inclined plane and show how ramps and wedges make work and play easier.

Introduces the principles of pulleys and gears as simple machines, using examples from everyday life.

Describes what wheels are and how they work, different types of wheels and their uses, and other facts about wheels.

Text and pictures introduce the wedge, a simple machine used primarily to split objects.

Text and pictures introduce screws, simple machines used primarily to lock things together.