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Author
Series
Publisher
Crabtree Publishing Company
Pub. Date
[2009]
Language
English
Description
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.
2) Ramps
Author
Series
Publisher
Bellwether Media
Pub. Date
2010.
Language
English
Description
Ramps are simple machines used for work and play. Workers use them for easy loading and unloading. Skateboarders use them to do tricks. Readers will learn how ramps make work easier and how they are used in everyday life.
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