Machines and How They WorkBook - 1983 | 1st ed
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.
Publisher: New York : Crowell, c1983
Edition: 1st ed
Branch Call Number: j621 W436m
Characteristics: 80 p. : ill. ; 24 cm