Readers won’t have to disassemble their favorite toys to discover what makes them work. This book explores electric, magnetic, and motion-powered toys from design to function. It introduces readers to six simple machines and explains how they use force and motion to do work. Not every toy is a technological marvel. Readers learn about time-honored favorites including the rocking horse, Slinky, and rattles.
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语言 英语 ● 格式 PDF ● ISBN 9781433392924 ● 出版者 Teacher Created Materials ● 发布时间 2009 ● 下载 3 时 ● 货币 EUR ● ID 8054754 ● 复制保护 Adobe DRM
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