Pulleys and Gears
Author: David Glover
Publisher: Heinemann-Raintree Library
Published: 2006
Total Pages: 28
ISBN-13: 9781403485649
DOWNLOAD EBOOKHow can pulling down make something go up? How do carnival rides work? What makes the hands on a watch go around? How does pedaling a bicycle make it move? This title shows you how different kinds of these two simple machines are all around you to make your work and play easier.