Get to Know Inclined PlaneseBook - 2009
All people have jobs to do. Some jobs take a lot of energy. Simple machines help people get jobs done without working too hard. There are six kinds of simple machines: inclined planes, levers, pulleys, wedges, screws, and wheels and axles.
Publisher: New York, NY : Crabtree Pub. Company, 2009.
Characteristics: 1 online resource (32 pages) : color illustrations.
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