Machines and how they work
By: Harvey Weiss.
Edition: 1st ed.
Publisher: Crowell
Published: 1983
Place of publication: New York
Language: eng
Number of pages: 80
Subjects: Simple machines -- Juvenile literature.; Pulleys -- Juvenile literature.; Gearing -- Juvenile literature.; Levers -- Juvenile literature.; Simple machines.
Description: An introduction to six simple machines--the lever, the inclined plane, the screw, the wheel and axle, the wedge, and the pulley--and their use in more complex machines such as derricks, bulldozers, and metal lathes.