Grade
4-6
Harvey Weiss
Machines and How They Work
Library Binding
(HarperCollins Oct. 1, 1983)
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.
- ISBN
- 0690043007 / 9780690043006
- Weight
- 15.2 oz.
- Dimensions
- 8.9 x 7.6 in.
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