Work and energy. 

 - Evanston, IL :  AGC Educational Media/United Learning,  1991. 
 -  1 videodisc (VCD) ( 10 min) : sd., col. ; 4 3/4 in. 
<br/><br/><br/>English 
<br/><br/><label>ISBN: </label>VCD 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Force and energy
<br/><br/><label>LC Class. No.: </label>531.6 W89 c1991