What Is a Pulley? (Welcome Books: Simple Machines)

Type
Book
Authors
ISBN 10
0516240242 
ISBN 13
9780516240244 
Category
NF-Machines, Structures, Force, & Movement  [ Browse Items ]
Publication Year
2002 
Publisher
Pages
24 
Description
Introduces pulleys and how they work to raise flags, as well as heavy objects. - from Amzon 
Number of Copies

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