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    3. Cindy Davis, Simple Machines

    Cindy Davis, Simple Machines

    Posted By: Direktor69
    Date: 24 Feb 2013 10:57:42
    Cindy Davis, Simple Machines

    Cindy Davis, Simple Machines
    ISBN: 155799689X | edition 1998 | PDF | 86 pages | 4 mb

    For hands-on activities about force, work, wheels, pulleys, and inclined planes that connect science with real life, choose Simple Machines. This book, designed with good science and easy teaching in mind, covers these concepts:
    work is done when a force is used to move something over a distance
    some jobs take more work that other jobs
    machines make work easier
    machines may have few, many, or no moving parts
    the lever is a simple machine


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