Work and machines
Edition: Purple edition
Series: Delta science content readers; Delta science content readers
Publisher: Delta Education
Published: 2009
Place of publication: Nashua, New Hampshire
Language: eng
Number of pages: 24
ISBN-13: 9781603953757
Subjects: Work (Mechanics); Juvenile literature; Simple machines
Notes: [Grades 4-5]
Table of contents: title: What is work?; title: How do machines help us do work?; title: What are simple machines?; title: What are compound machines?