Mechanical energy : The moving force /  Gratian Vas. 

 - Elgin, IL :  Rising Sun,   c2005.   
 - 32p. : ill.   
<br/><br/> Cover title <br/><br/> 
<br/><br/><label>Subjects--Topical Terms: </label>
<br/><br/><label>Dewey Class. No.: </label>CIR 531.6 V442 2005