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What is “Friction”?

What is “Friction”?. Friction - the force that resists motion. Friction -. Three types of friction Rolling Sliding Fluid. MagLev Design Challenge. Engineering Design Process Steps. Understand the Need. What is the problem? What are the project requirements?

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What is “Friction”?

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  1. What is “Friction”?

  2. Friction - the force that resists motion

  3. Friction - • Three types of friction • Rolling • Sliding • Fluid

  4. MagLev Design Challenge

  5. Engineering Design Process Steps

  6. Understand the Need • What is the problem? • What are the project requirements? • What resources are available?

  7. The problem or challenge is to design and construct a magnet levitation vehicle that has a seat for a Lego man, and can go quickly down the track.

  8. Identify Criteria • The vehicle MUST be: • ___2 1/2____ inches wide • __7 to 9____ inches long The MagLev will be made with popsicle sticks that are 3/8” wide and 4 ½” long The magnets are 1 inch by 3/4 inch

  9. Brainstorm and Design • Imagine and brainstorm ideas. • Be creative. • Explore, compare and analyze many possible solutions. • Select the most promising idea.

  10. Brainstorm a Solution • Draw at least 4 ideas to solve the challenge.

  11. Plan • Draw a diagram of your idea. • How will it work? • How will you test it to make sure it works?

  12. Create • Build a prototype. • Does it work? • Talk about what works, what doesn’t and what could work better.

  13. Improve • Talk about how you could improve your end product. • Make revisions. • Draw new designs. • Make your end product the best it can be.

  14. MagLev Steps Build chassis Make sure it fits If it fits, add magnets Build a seat for the Lego Man Crash Test If he survives, add a motor

  15. Engineering Design Process • Define the Problem • Brainstorm a Solution • Generate Ideas • Identify Criteria • Explore Possibilities • Make a Prototype • Test and Evaluate the Design • Refine the Design

  16. Generate Ideas • Redraw your ideas on the handout. • On the back of the paper, write the name(s) of the people you think you would like to work with. • Groups of 1 or 2

  17. Identify Criteria __________ wide __________ long

  18. Explore Possibilities • Sit with your group and decide on ONE design that you feel is the most efficient. • EVERYONE in the group MUST redraw the design on grid paper. • This is to be done full sized.

  19. Make a Prototype • Construct the MagLev chassis. • Tape one drawing to the foam board • Tape wax paper over the drawing

  20. Lego Man

  21. Test and Evaluate the Design • The chassis MUST fit inside the track • Once it fits, add magnets • If it floats, build a seat for the Lego man • Crash test with a Lego man • If he stays in, add a motor • RACE!!!!

  22. Refine your Design • Make repairs to your vehicle. • Write a summary of the project. • Be sure to include an explanation of how you could have improved the speed of your vehicle.

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