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U4 EDC: Egg Car Collisions

Posljednje ažuriranje over 3 years ago

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Instrukcije

Work through the formative with your group, each student needs their own document

Step 1: Define the Problem

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Step 2: Research

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Step 3: Plan & Evaluate

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Step 4: Construct the Intial Prototype

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Step 5: Test and Evaluate Your Solution

Run three tests for your car. Calculate the average speed and kinetic energy of your car and include units. Describe modification needed for the next trial and include photo evidence after the collision.

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Step 6: Confer and Analyze

You will confer with 3 other teams to attribute design features to each of Newton’s Laws of Motion, use the questions below to guide your conference. Go around to other teams to see the design features they selected, and write your notes regarding their prototypes below.

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Step 7: Redesign the Final Prototype & Retest

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Retest your final prototype three times. Calculate the average speed and kinetic energy of your car and include units. Describe the modification needed for the next trial and include photo evidence after the collision.

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Step 8: Evidence-Based Critique

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Identify the Problem:

Humpty Dumpty’s teenager just got their driver’s license. Humpty has been car shopping all over the kingdom and he has

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not found a safe vehicle. Just like a chip off the old block, Lil’ Humpty has inherited his father’s fragility and

tendency to get into full frontal collisions. The king and all his men are offering a pile of gold for a car design that can withstand a collision with the infamous castle wall (Newton’s Third Law of motion in collisions between two objects). Sample car video

Develop Criteria:

Criteria for success - egg lives unblemished

Durability: Car launches multiple times

Constraints:

Time: 3 class periods total

Materials: Hot glue, tape, 2 pieces of 8 X 11” paper, 1 unmodified egg, must have an unrestricted plastic straw “wheel hub” (wheels and axle will be provided)

Dimensions: Car cannot be wider than 6 cm including the car axle.

Pitanje 1

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Criteria: How will you address the criteria with your car design? Which needs are associated with addressing the criteria?

Pitanje 2

2.

Constraints: Which constraints will be the most challenging for your team based on your chosen criteria? Why?

Question 3

01:57

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Question 4

03:07

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Question 5

06:28

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Question 6

08:26

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Question 7

11:03

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Pitanje 8

8.

What testing process do new cars go through to ensure the safety of its passengers? Describe how the law of inertia informs this process.

Pitanje 9

9.

You will consider Newton's Laws and design your car before building it. Which of Newton's 3 Laws will have the biggest impact on the car design? Why?

Research car prototypes (click the link) and select three to evaluate. Copy and paste the picture of the three prototypes you selected in the "show your work" sections to the right and write a 1 sentence evaluation of a specific design feature. Be sure to include which criteria will be addressed by that design feature.

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Pitanje 10

10.

Describe the first prototype feature and how it will address the criteria.

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Pitanje 11

11.

Describe the second prototype feature and how it will address the criteria.

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Pitanje 12

12.

Describe the third prototype feature and how it will address the criteria.

Pitanje 13

13.

Draw your initial prototype, either digitally or on paper, just click on the image icon
and insert a clear photo of your design.

🛑 You can now get materials to start building after you check in with your teacher. Remember:

Materials: Hot glue, tape, 2 pieces of 8 X 11” paper, 1 unmodified egg, must have an unrestricted plastic straw “wheel hub” (wheels and axle will be provided)

Dimensions: Car cannot be wider than 6 cm including the car axle.

Pitanje 14

14.

What is the name of your car?

Pitanje 15

15.

Use a scale to find the mass of your car in grams.

Pitanje 16

16.

Insert 2 pictures of your built car, from the top-down and side view.

Pitanje 17

17.

TEST 1

Average Speed = total distance ÷ total time =

Kinetic Energy = ½ mass * (avg. speed)²=

Modification Needed for Next Trial:

Pitanje 18

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TEST 2

Average Speed = total distance ÷ total time =

Kinetic Energy = ½ mass * (avg. speed)²=

Modification Needed for Next Trial:

Pitanje 19

19.

TEST 3

Average Speed = total distance ÷ total time =

Kinetic Energy = ½ mass * (avg. speed)²=

Modification Needed for Next Trial:

Pitanje 20

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Evaluation:
What design features were effective during your testing to meet your criteria? Cite specific features. What alteration or modification had the most significant change during testing? Cite specific examples.

Pitanje 21

21.

What design features address the inertia of the egg during the collision? Explain why.

Pitanje 22

22.

What design features address the kinetic energy in the collision between the car and the wall? Remember KE = ½ m*v²

Pitanje 23

23.

What design features use friction to their advantage when planning for the collision.

Pitanje 24

24.

Redesign:
What changes must be made to improve your car? Include specific design features (if you are using a feature from another team, cite them as your source).

Pitanje 25

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RETEST 1

Average Speed = total distance ÷ total time =

Kinetic Energy = ½ mass * (avg. speed)²=

Observations - any notes about how the design features performed?

Pitanje 26

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RETEST 2

Average Speed = total distance ÷ total time =

Kinetic Energy = ½ mass * (avg. speed)²=

Observations - any notes about how the design features performed?

Pitanje 27

27.

RETEST 3

Average Speed = total distance ÷ total time =

Kinetic Energy = ½ mass * (avg. speed)²=

Observations - any notes about how the design features performed?

Pitanje 28

28.

Insert 2 pictures of your car POST-Collision, from the top-down and side view.

Critique at least two design features as successful or needing a redesign if there were future iterations for the King. Cite your Post-Collision photo as your evidence for criteria critiqued here.

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Pitanje 29

29.

Design Feature #1

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Pitanje 30

30.

Design Feature #2

Pitanje 3

3.

Which of Newton's laws BEST describes why the crash dummy fell off the truck?

Newton's 1st law of inertia: objects at rest want to remain at rest

Newton's 2nd law: force is equal to mass and acceleration

Newton's 3rd law: forces are equal and opposite.

Pitanje 4

4.

Why does the dummy keep moving after the car hits the barrier?

When the car stops, the dummy jumped forward

When the car stops as it hits the barrier, the dummy continues to move at its original speed

When the car hits the barrier, the dummy starts moving at a faster speed than it was originally moving

Pitanje 5

5.

The amount of kinetic energy an object has depends on its.

Pitanje 6

6.

What determines a vehicle's crash worthiness? Check ALL that apply.

mass

make and model

structure

color

restraint system

Pitanje 7

7.

What vehicle safety features are critical to protecting people inside the vehicle? Check ALL that apply.

the size and shape of the car

a crumple zone in front of the car that buckles to slow the speed of the car

seatbelts & airbags

the location of the steering wheel

an occupant compartment that prevents intrusion