Machines allow us to do many things quicker or with less effort. What is one thing we want to accomplish whenever we have to do work? (Answer: We want our work to be easier – unless, for example, we are athletes training for a competition then we know it's going to be very hard, no matter what.) Finding ways to make work easier is what drives people to invent (better) machines.
Associated with this definition is a mathematical concept which will be used throughout this unit: According to engineering and science, work is the energy it takes to move an object. Today we are going to talk about a particular kind of work as defined by physical scientists and used by engineers. Explain why engineers are interested in simple machines.Recognize and identify the six simple machines.Have students test their knowledge by designing simple machines from the activity A Simple Solution for the Circus.Īfter this lesson, students should be able to: Engineers draw upon their understanding of the six simple machines when they are inventing new, or refinining existing, machines. Both high- and low-tech cultures use simple machines to accomplish daily tasks and improve our lives. Simple machines are the building blocks for many of the mechanical devices - both ancient and very modern - used by society for improving everyday challenges. This lesson serves as the starting point for the Simple Machines Unit. Already encountering simple machines everyday, students will learn about their widespread uses in improving everyday life. 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.
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