Détails du livre
Format
Kindle
Pages
24
Langue
Anglais
Publié
Jan 1, 2014
Éditeur
The Child's World
ISBN-10
1631431315
ISBN-13
9781631431319
Description
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.