date lesson 6: evaluating vehicle design: looking at rubber band energy

DateLesson 6: Evaluating Vehicle Design: Looking at Rubber

Band EnergyQuestion: 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!

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

Lesson 7 Photos

Lesson 7 continuedConclusion/Reflection:Next Steps/ New Questions:

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:

Date Lesson 9: Designing and Building a Vehicle with a SailQuestion: What happens when you attach a sail

to your vehicle?Hypothesis: Plan/ Observations (Write and draw):Conclusion/Reflection:

Next Steps/ New Questions:

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

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:

DateLesson 11: Building a Propeller-Driven VehicleQuestion: 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.)

Examples of Propeller Driven Vehicles

Lesson 11 Technical Drawing

SI pg. 48

Propeller-Driven Vehicle Pieces

6 Yellow Connectors6 Green Rods6 Red Connectors2 Orange Connectors1 Blue Rod3 Red Rods4 Grey Rods4 Small Wheels4 Tan Connectors1 White Connector4 Yellow Rods

Propeller-Driven Vehicle

Propeller-Driven Vehicle

Front View Top View

Side View Rear View

Lesson 11 continuedObservations: Chart

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:

DateLesson 12: Analyzing the Motion and Design of a Propeller-Driven VehicleQuestion: 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:

DateLesson 13: Looking at CostQuestion: 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:

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-AConclusion/Reflection:

Next Steps/ New Questions: (Reading Selection SI p.60-61)

Design Challenge Presentations

Dueling Flipchart Game1. A push or a pull ________________________2. Energy in motion is called _____________ energy.3. Force that resists movement between two objects that

are touching _______________________4. The force exerted by a stretched object, such as a

spring  5. An original model of a design _______________________6. A detailed plan or drawing that shows how something is

designed ____________________________7. Stored energy is ______________ energy8. How does friction affect motion? ________________________9. 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

force

friction

kinetic

prototype

blueprint

tension

potentialSlows down/ stops motion

momentuminertia

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.