Patricia Armentrout
3) The pulley
Author
Series
Language
English
Description
Text and pictures introduce the pulley, a simple machine used primarily to lift heavy objects.
4) The lever
Author
Series
Language
English
Description
Text and pictures introduce the lever, a simple machine used to change force and motion.
5) The wedge
Author
Series
Language
English
Description
Text and pictures introduce the wedge, a simple machine placed between objects to split, tighten, or secure a hold.
7) The wheel
Author
Series
Language
English
Description
Text and pictures introduce the wheel, a simple machine used primarily to make it easy to move heavy loads.
8) The screw
Author
Series
Language
English
Description
Text and pictures introduce the screw, a simple machine used primarily as a fastening device.
10) Rap
Author
Series
Language
English
Description
Discusses the origins, development and different aspects of the popular musical style, known as rap.