Simple machines
Author
1) Pulleys
Author
Series
Pub. Date
c2013
Description
Presents a look at pulleys, explaining how these simple machines work and describing some common examples that have been used throughout history.
2) Screws
Author
Series
Pub. Date
2013
Description
Presents a look at screws, explaining how these simple machines work and describing some common examples that have been used throughout history.
