Introduces the principles of pulleys and gears as simple machines, using examples from everyday life.
- ISBN10 1403485933
- ISBN13 9781403485939
- Publish Date 8 May 2006 (first published 13 November 1996)
- Publish Status Out of Print
- Out of Print 20 April 2021
- Publish Country US
- Imprint Heinemann Educational Books
- Format Paperback (US Trade)
- Pages 24
- Language English