Springs have been used for more than 500 years as a simple machine that can make other machines work. When you open a screen door, open an umbrella, sit on a so

The 11 lessons in this module introduce students to single and compound pulleys and gear systems. Students investigate, design, and construct various pulley sys

Examines simple machines, ranging from pliers to cranes, in a book with twenty easy-to-do experiments.

Machine Drawing is divided into three parts. Part I deals with the basic principles of technical drawing, dimensioning, limits, fits and tolerances. Part II pro