Simple Machines: Wheels, Levers, and Pulleys by David A. Adler
Simple Machines: Wheels, Levers, and Pulleys

David A. Adler

Simple Machines: Wheels, Levers, and Pulleys

David A. Adler with Anna Raff

32 pages first pub 2015 (editions)

nonfiction childrens nature science technology informative medium-paced
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Description

How many simple machines do you use every day? Probably more than you realize Machines make work easier-- helping break things apart, lift heavy objects, and change the power and direction of force applied to them. In this accessible picture bo...

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