Mouse Trap Car Project

Mousetrap Cars - Dec 2010 NGHS Mousetrap Car Show
 
Photo Gallery - Students with their Cars
 
Exemplary Presentations
 
 

Deadlines:

1.    Test Drive -    Wednesday, November 17, 2010

2.    Final Date -    Wednesday, December 8, 2010

 Project Rules:

1.    Your car must have your name in permanent magic maker in an obvious location. No car 

        should be painted. Painted cars will be disqualified.

2,    Your mousetrap car may be powered by only a single mousetrap. (no rat traps)

2.    No gears, pulleys, or other potential/kinetic energy enhancing devices maybe used to  

        supplement the spring of the mousetrap car.

3.    The spring may not be altered by further twisting.

4.    Pushing the mousetrap car is not allowed.

5.    You will be allowed two attempts to start the car.

6.    Late penalties:

        One-day late - Top Grade of 90; Two-days- Top Grade of 80; 

        Holiday Extensions - Top Grade 60

7.    Traveled distances will be measured in a perpendicular path from the starting line to the

        finish line; Diagonal distances will not count toward the 5 meter required distance

  

HotList: - http://www.kn.att.com/wired/fil/pages/listmousetrapa.html

Links that:

1.    explain what a mousetrap car is...

2.    explain how a mouse trap car works...

3.    explain the science of mousetrap cars...

4.    allow you to purchase kits online.

 

 

Grading Rubric, Data / Calculation Table, and Analysis Questions:

 

CATEGORY

5

4

3

1 or 2

Information Gathering

Accurate information is taken from 5 sources in a systematic manner and recorded into the engineering journal

Accurate information is taken from 3 to 4 sources in a systematic manner

Accurate information is taken from 2 sources but not systematically

Information is taken from only one source and/or information not accurate

Plan

Plan is illustrated with a front, side and top view. All the components are clearly labeled with the measurements included

Plan is illustrated with clear measurements and labeling for most components

Plan provides some measurements and labeling for a few components

Plan does not show measurements or is otherwise inadequately labeled

Documentation

A minimum of 10 jpg. photographs or videos including the designer(s) of the project that provide a record of the project from the planning, construction and testing

5 jpg. photographs or videos, including the student(s) that document the project from the planning stages through to the construction phase, and testing

3 jpg. photographs or videos that document the project from the planning stages through to the construction phase

No photographs or videos documenting the car project

Modifications to the Original Plan

Journal provides a complete record of planning, construction, testing, modifications, reasons for modifications, or lack thereof, and some reflection about the strategies used and the results

Journal provides a complete record of planning, construction, testing, modifications, and reasons for modifications

Journal provides quite a bit of detail about planning, construction, testing, modifications, and reasons for modifications

Journal provides very little detail about several aspects of the planning, construction, and testing process

Data Collection

Data collection includes all of the following: (1) 3 time trials, (2) 3 graphs of the trials, & (3) the average velocities for all trials calculated

All of the elements of the five point category except 1 of the trials were graphed or calculated incorrectly

All of the elements of the five point category except 2 of the trials were graphed or calculated incorrectly

Several aspects of the data collection were missing or in error

Analysis Questions

All analysis questions were answered correctly and in complete sentences

8 of the 10 analysis questions were answered correctly and in complete sentences

6 of the 10 analysis questions were answered correctly and in complete sentences or all of the questions were answered in phrases

5 or fewer questions were answered correctly, or the answers were given in phrases

Function

12/8/10 -

Mousetrap car exceeds the 5.0 m distance in a straight line requirement.

12/8/10 -

Mousetrap car travels the required 5.0 m distance in a straight line.

12/8/10 -

Mousetrap car travels the 5.0 m distance required, but not in a straight line

12/8/10 -

Mousetrap car fails to start or fails to travel the required 5.0 m distance.

Construction - Care Taken

Great care taken in construction process so that the structure is neat, attractive and follows plans accurately.

Construction was careful and accurate for the most part, but 1-2 details could have been refined for a more effective mousetrap car.

Construction accurately followed the plans, but 3-4 details could have been refined for a more effective mousetrap cart.

Construction appears careless or haphazard. Many details need refinement for a strong or effective mousetrap car.

 

 

 

Total Points X 1.25  =   _________________  Project Score

  

 

Data and Calculations Table

Mass of Mousetrap Car (kg)

 

 

Distance Traveled  (m)

 

 

Weight of Car (N)

 

Time to travel 1 meter

 

Trial 1

Trial 2

Trial 3

Average

Time to travel 2 meters

 

 

 

 

 

Time to travel 3 meters

 

 

 

 

 

Time to travel 4 meters

 

 

 

 

 

Time to travel 5 meters

 

 

 

 

 

Average Velocity - 1. Graph the distance vs. time.  2. Calculate the slope using the graph.

Slope = Rise

             Run

 

Average Acceleration - use the average time for the 5.0 m displacement

   (Solve for a)

 x = vot  + 1/2 at2

 

Final Velocity of the Car

vf = vo  + at

 

Net Force provided by spring

Fnet = ma

 

Change in momentum of the car

 Δp  = mΔv

 

Kinetic Energy of the car

KE  =  1/2mv2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                                                                                 

 1.         Graph the distance vs. the average time.

 

2.         Calculate the average velocity of your mousetrap car by calculating the slope of  the graph.

 

 Analysis Questions:

 

1.         Use Newton's First Law of Motion as a framework to discuss the cause of the mousetrap car's initial motion, it's path once

             moving, and the force that eventual brings the car back to rest.

 

2.         Use Newton's Second Law of Motion as a framework to discuss the mechanism that provided the net force, and the effect of

            the car's mass on its acceleration.

 

3.         Several action-reaction pairs are at work in the Mousetrap Car. Use Newton's Third Law to describe action-reaction pairs,

             specifically using the tires and the floor as an example.

 

4.         Discuss the sizes of your car's front and rear wheels. Describe the pros and cons of small versus large wheels.

 

5.         Describe the construction strategies you used to increase the distance that your mousetrap car would travel.

 

6.         What aspect of a car must be in place in order for the car to travel in a straight- line. Describe the modifications you had to

             make on your car to improve that aspect of your car's performance.

 

7.         Discuss the points where unwanted friction occurred in the operation of your car, and what you did to minimize this force that

             opposed the motion of you car.

 

8.         You may have observed the extension of the lever arm in some student's cars.  How does the length of the lever arm affect the

             performance of the car?

 

9.         What did you use to improve the traction between your car's wheels and the floor?

 

10.       What design characteristics did the fastest or longest traveling mousetrap car in your class possess?

 

 

ĉ
Paula Fowler,
Dec 1, 2010, 4:12 PM
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