Force in materials. 

 - Videocassette (VHS)(25 min.) : sd., col. 1/2 in. 
<br/><br/> This programme is concerned with the effect that forces may have when they act inside materials particularly engineering materials. It looks at how different materials respond in different ways to the forces that act in them. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Force and energy.<br/>Materials--Testing.