The Advantage of Machines
In this lesson, students learn about work as defined by physical science and see that work is made easier through the use of simple machines. Already encountering simple machines everyday, students will learn about their widespread uses in improving everyday life. This lesson serves as the starting point for the Simple Machines Unit.
Figure 1. A handcar, a simple machine that operates on the principle of the lever.Copyright National Park Service, http://www.nps.gov/stea/planyourvisit/tour01.htm
Simple machines are the building blocks for many of the mechanical devices - both ancient and very modern - used by society for improving everyday challenges. Both high- and low-tech cultures use simple machines to accomplish daily tasks and improve our lives. Engineers draw upon their understanding of the six simple machines when they are inventing new, or refinining existing, machines. Have students test their knowledge by designing simple machines from the activity A Simple Solution for the Circus.
After this lesson, students should be able to:
- Recognize and identify the six simple machines.
- Define the concept of work.
- Explain why engineers are interested in simple machines.