Download or read book Pulleys and Gears written by David Glover and published by Heinemann-Raintree Library. This book was released on 2006 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: How 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.