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Stop the Stretching

Stretch your teaching repertoire with an experiment on the elongation (stretching) and failure (break) of several materials. The point of the experiment is to design a composite material for chair webbing.

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Instructional Ideas

  • Have the class conduct a web quest on composite materials
Classroom Considerations

  • Activity requires a lot of materials; see materials list for requirements
  • Learners need access to a graphing program or to graphing paper
Pros

  • Worksheets are available in both PDF and document versions
  • Teenagers can appreciate the hands-on nature of the lesson
Cons

  • Background notes are similar to those in previous lesson
Included Materials

  • Fundamental Facts about Forces and Structures (pdf)
  • Fundamental Facts about Forces and Structures (doc)
  • Constructing the Tensile Test Stations (pdf)
  • Constructing the Tensile Test Stations (doc)
  • Problem Statement Worksheet (pdf)
  • Problem Statement Worksheet (doc)
  • Fundamental Facts about Forces and Structures (pdf)
  • Fundamental Facts about Forces and Structures (doc)
  • Constructing the Tensile Test Stations (pdf)
  • Constructing the Tensile Test Stations (doc)
  • Problem Statement Worksheet (pdf)
  • Problem Statement Worksheet (doc)