Pulleys (Simple Machines) Reviews

UPDATE TIME: 2019-02-07 
Review Score: 4 out of 5 star From 0 user ratings
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Book Introduction: Readers learn how this simple machine makes it easier to lift and lower objects. They learn about fixed and movable pulleys and when it is best to use each. By the end of the book, readers know the difference between complex and simple machines and how pulleys are used in everyday life to make work easier.

June 2019 New Book:

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