Put Pulleys to the Test (Searchlight Books ™ ― How Do Simple Machines Work?)
Released: Aug 01, 2011
Publisher: Lerner Publications ™
Format: Library Binding, 40 pages
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Description:
What do flagpoles and some window blinds have in common? They use pulleys to perform work! Pulleys are simple machines. They help us to do jobs more easily. But dont take our word for it. Put pulleys to the test with the fun experiments youll find in this book.
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