gearing

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

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

Uses simple text, illustrations, and activities to introduce wheels and cogs and how they work.

A color-illustrated overview of pulleys and gears that describes drive belts, clocks and watches, bevel gears, bicycles, and other related topics. Also includes a glossary and instructions for making a toy windmill.