Challen, Paul C.  1967- <br/><br/>
Get To Know Wheels And Axles 

 - New York, NY :  Crabtree Pub. Company,  2009. 
 - 32 p. ;  col. ill. ;  29 cm. 
 - Get to know simple machines .
<br/><br/> Includes index. 
<br/><br/>Wheels and axles -- The basic design -- How it works -- Wheel and axle in action -- Moving loads -- A multi-axle model -- A lifting machine -- Build a lifting machine -- Wheels and axles in action -- The fan in action -- Fighting friction -- How friction happens -- The wheel and axle as part of a complex machine -- Glossary. 
<br/><br/> Read all about wheels and axles and their many uses in this new book. Children will be thrilled to learn of their many uses, from doorknobs to the insides of a clock. There are wheels that move, turn, steer, and serve as gears. 
<br/><br/><label>ISBN: </label>9780778744719  
<br/><br/><label>LCCN: </label>2009004588 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Wheels--Juvenile literature.<br/>Axles--Juvenile literature.
<br/><br/><label>LC Class. No.: </label>TJ147  / .C45 2009 
<br/><br/><label>Dewey Class. No.: </label>621.8 CHA