Details
PUBLISHED
[United States]: Bellwether Media, 2010
Made available through hoopla
Made available through hoopla
DESCRIPTION
1 online resource
ISBN/ISSN
9781612113128 (electronic bk.) MWT11934406, 1612113125 (electronic bk.) 11934406
LANGUAGE
English
NOTES
Pulleys are simple machines used to lift and move loads. Builders use pulley systems to lift tools or materials. Elevators use pulleys to move up and down. Kids will learn how pulleys make work easier and how they are often part of complex machines
Mode of access: World Wide Web