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Date Lesson 6: Evaluating Vehicle Design: Looking at Rubber Band Energy

Date Lesson 6: Evaluating Vehicle Design: Looking at Rubber Band Energy. Question : How can you use rubber band energy to move a vehicle? Hypothesis : Plan/ Observations : Record Sheet 6-A (2 pages) Conclusion:. Don’t forget your goggles!.

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Date Lesson 6: Evaluating Vehicle Design: Looking at Rubber Band Energy

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  1. DateLesson 6: Evaluating Vehicle Design: Looking at Rubber Band Energy • Question: How can you use rubber band energy to move a vehicle? • Hypothesis: • Plan/ Observations: Record Sheet 6-A (2 pages) • Conclusion: Don’t forget your goggles!

  2. DateLesson 7: Testing the Effects of Rubber Band Energy • Question: How will the number of turns in the rubber band affect the distance the vehicle travels? • Hypothesis: • Plan/ Observations: Record Sheet

  3. Lesson 7 Photos

  4. Lesson 7 continued • Conclusion/Reflection: • Next Steps/ New Questions:

  5. DateLesson 8: Evaluating Vehicle Design: Looking at Friction • Question: How does friction affect the motion of your vehicle? • Hypothesis: • Plan/ Observations: Record Sheet 8-A (3 sheets) • Card One: • Card Two: • Card Three: • Conclusion/Reflection: Friction is the force that resists movement between two objects that are touching. It slows down movement. • Next Steps/ New Questions:

  6. Date Lesson 9: Designing and Building a Vehicle with a Sail Question: What happens when you attach a sail to your vehicle? Hypothesis: Plan/ Observations (Write and draw): Conclusion/Reflection: Next Steps/ New Questions:

  7. Date Lesson 10: Testing the Effects of Air Resistance on a Vehicle’s Motion • Question: What is air resistance? How does air resistance affect the motion of a vehicle with a sail? • Hypothesis: • Plan/ Observations: Chart

  8. Lesson 10 continued • Conclusion/Reflection: Air resistance is the force of friction on a vehicle as it moves through the air. It opposes a vehicle’s motion and slows it down. Engineers refer to air resistance as drag. Designs that minimize drag are known as aerodynamic (able to move through the air with as little air resistance as possible). For example, many automobile shapes are curved without sharp corners. • Next Steps/ New Questions:

  9. DateLesson 11: Building a Propeller-Driven Vehicle Question: What do you know about propeller-driven vehicles? How can you build a propeller-driven vehicle? Hypothesis: (Brainstorm and draw). (Show pictures on next slide.)

  10. Examples of Propeller Driven Vehicles

  11. Lesson 11 Technical Drawing SI pg. 48

  12. Propeller-Driven Vehicle Pieces • 6 Yellow Connectors • 6 Green Rods • 6 Red Connectors • 2 Orange Connectors • 1 Blue Rod • 3 Red Rods • 4 Grey Rods • 4 Small Wheels • 4 Tan Connectors • 1 White Connector • 4 Yellow Rods

  13. Propeller-Driven Vehicle

  14. Propeller-Driven Vehicle Front View Top View Side View Rear View

  15. Lesson 11 continued Observations: Chart

  16. Lesson 11 continued Conclusion/Reflection: Propellers create a force that moves airplanes and boats forward. Even when an airplane is on the ground, the force from the spinning propellers enables it to taxi on and off the runway. Next Steps/ New Questions:

  17. DateLesson 12: Analyzing the Motion and Design of a Propeller-Driven Vehicle Question: How will modifying the propeller driven vehicle affect its performance? Record Sheet 12-A (2 sheets) All parts of the scientific method are embedded in the Record Sheet. Conclusion/Reflection: Next Steps/ New Questions:

  18. DateLesson 13: Looking at Cost Question: How can you modify your propeller-driven vehicle to make it more cost-effective? Hypothesis: Plan/ Observations: Record Sheet 13-A Conclusion/Reflection: Cost-effective is the ability to produce the best results for the least amount of money. You can reduce vehicle cost by: -taking off the big pieces that cost a lot -replacing larger wheels with small wheels -taking off fancy pieces that are just for looks -reducing the number of pieces. Next Steps/ New Questions:

  19. DateLesson 14-16: Our Final Design Challenge Question: How can you design and refine a vehicle to meet a specific requirement? (See Design Challenge) Hypothesis: Plan/ Observations: Record Sheet 14-A Conclusion/Reflection: Next Steps/ New Questions: (Reading Selection SI p.60-61)

  20. Design Challenge Presentations

  21. Dueling Flipchart Game force kinetic • A push or a pull ________________________ • Energy in motion is called _____________ energy. • Force that resists movement between two objects that are touching _______________________ • The force exerted by a stretched object, such as a spring   • An original model of a design _______________________ • A detailed plan or drawing that shows how something is designed ____________________________ • Stored energy is ______________ energy • How does friction affect motion? ________________________ • The tendency that any moving object has to keep going unless something stops it. _______________________ 10. _____________: An object at rest stays at rest; an object in motion stays in motion friction tension prototype blueprint potential Slows down/ stops motion momentum inertia

  22. Newton’s Laws of Motion Three laws that describe how objects move in relation to the forces acting on them. 1. An object in motion tends to remain in motion, and an object at rest tends to remain at rest (Inertia). 2. To move a mass, you have to have force. Force equals mass times acceleration. 3. Action/ Reaction: For every action, there’s an equal and opposite reaction.

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