Screws /

We've all seen screws, but how do they work' Why is it easier to screw something into something than to simply push it in' With basic hands-on experiments and clear descriptions, this simple machine is explained.

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Bibliographic Details
Online Access:Electronic book from EBSCO
Main Author: Walker, Sally M.
Other Authors: Feldmann, Roseann., King, Andy (Illustrator)
Format: eBook
Published:Minneapolis : Lerner Publications, ©2002.
Series:Walker, Sally M. Early bird physics books.