1 / 18

The Wonderful World of…

The Wonderful World of… . TECHNOLOGY. Class Starter Questions. What is technology? What is a technical object? Give some examples. What objects are not technical objects? Give some examples. What types of materials are technical objects made of? Take a look at your pencil:

ayoka
Download Presentation

The Wonderful World of…

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Wonderful World of… TECHNOLOGY

  2. Class Starter Questions • What is technology? • What is a technical object? Give some examples. • What objects are not technical objects? Give some examples. • What types of materials are technical objects made of? • Take a look at your pencil: • Is it a technical object? • What materials is it made of? • Why were these materials chosen? • What happens when there is too much stress on a material?

  3. What IS technology?

  4. What is Technology? Technology is the making, usage, and knowledge of tools, machines, techniques, crafts, systems or methods of organization in order to solve a problem or perform a specific function.

  5. What’s a Technical Object? A man-made object that serves a purpose.

  6. Materials • Wood • Metal • Plastic • Stone • Ceramic • Textile • Glass • Synthetic materials

  7. Your Pencils (again) Have you ever asked yourself why pencils are never made out of rubber? Or out of glass?

  8. Your Pencils Take a look at your pencils in your hands • Is it a technical object? • What are the materials it is made of? • Why were these materials chosen?

  9. MATERIALS • External forces produce various effects inside a material. EXAMPLE: *Consider what would happen if an elephant walked in the room and stepped on your pencil. What would the effect be? EXTERNAL FORCE = Elephant weight EFFECT = pencil being crushed

  10. Different materials react differently to different external forces. A material will undergo a mechanical constraint due to the force.

  11. MECHANICAL CONSTRAINTS “A mechanical constraint describes the stress produced within a material when it is subjected to external forces.” 5 types of constraints: Compression, Tension, Torsion, Bending, Shearing

  12. COMPRESSION: Force that crushes materials

  13. TENSION: Force that stretches materials

  14. TORSION:Force that twists materials

  15. BENDING:Force that bends materials

  16. SHEARING:Force that cuts or tears materials

  17. EXAMPLES: Tension, bending • SHOES: • CLICKER: • WATER BOTTLE: Compression Torsion, compression

  18. What happens when there is TOO MUCH STRESS on a material? • Elastic deformation – Temporary deformation of material. Resumes shape. • Plastic deformation – Remains deformed. • Fracture – Material ruptures.

More Related