Wedges (Simple Machines (Creative Paperback)) (Simple Machines (Creative Library))
by Valerie Bodden
"A foundational look at wedges, explaining how these simple machines work and describing some common examples, such as shovels, that have been used throughout history"--Provided by publisher.
Engineering and Building Robots for Competitions (Hands-On Robotics)
by Margaux Baum and Joel Chaffee
"Amazing photography accompanies engaging information about V-22 Ospreys. The combination of high-interest subject matter and light text is intended for students in grades 3 through 7"--Provided by publisher.
Put Pulleys to the Test (Searchlight Books (TM) -- How Do Simple Machines Work?) (Searchlight Books How Do Simple Machines Work)
by Roseann Feldmann and Sally M Walker
Machines in the Home (Discoveries & Inventions) (Discoveries & Inventions S.)
by Rebecca Weaver
This description of how machines in the home were developed and how they revolutionized the drudgery of housework is part of a series covering the history of science and technology. It is intended for students of 14 years and upwards, their teachers and students of social and economic history.
What can you do with paper clips and other tiny items that fall under your bed or get lost in a drawer? Send them flying with your own miniature launcher! With step-by-step instructions to create a tabletop version of this medieval machine using simple materials found around the house, this book introduces basic engineering and physics concepts to readers.
Machines at Work (Set) (Machines at Work)