Beschreibung
Pulleys are simple machines used to lift and move loads. Builders use pulley systems to lift tools or materials up high and elevators go up and down with the help of pulleys. Kids will learn how pulleys make work easier and how they are often part of complex machines.
Buchdetails
Format
E-Book
Seiten
25 Seiten
Sprache
Englisch
Veröffentlicht
Aug 1, 2009
Verlag
Bellwether Media
Ausgaben
2 Ausgaben
ISBN-10
1612115047
ISBN-13
9781612115047