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Optimal Car Configuration for Fast Track Racing Experiment

Explore the effect of wheel number and rubber on speed using Mindstorms NXT in this science fair project. Test different combinations, track lap times, record data, and analyze results to draw conclusions on car performance.

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Optimal Car Configuration for Fast Track Racing Experiment

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  1. Science Fair 2013 Aaron Heo Period 6

  2. Question Which combination will allow a car to travel faster around a track?

  3. Hypothesis The combination with three wheels and no rubber on the front wheel will complete a lap in the shortest amount of time.

  4. Materials • Mindstorms NXT 2.0 kit (Lego.com) • Computer (home) • Mindstorms NXT 2.0 Program (CD that is included) • Stopwatch (home)

  5. Variables: Independent • Number of wheels • Rubber on the front wheels

  6. Variables: Dependent • Time it takes to complete a lap

  7. Procedure • First, download the programming software off of the CD provided in the kit. • Use the pieces provided in the Mindstorms NXT 2.0 kit to build a body for the car. • Use the motors included in the kit and add four wheels, using rubber, to the body. • Add the color/light sensor to the design of the car (the closer it is to the floor, the better). • Create a program that will make the robot car travel around the black line on the mat (included in the kit) using the Mindstorms NXT 2.0 Program. • Connect the Microcomputer Brick to your computer using the wire that was included in the kit. • Download the programming you have done into the Microcomputer Brick. • Test the programming you have created and see if the robot can successfully complete one lap around the mat with the black track. • If it does not fully complete a lap in less than five minutes make some changes to your car or the programming. • Place your car where it says start and time how long it takes to complete one lap • Once, finished record your time in the table (in seconds).

  8. The Test Track

  9. Diagram Light/Color sensor Microbrick computer (brain) Motors Wheels 2. 1. 3. 4.

  10. Combinations

  11. Table

  12. Graph

  13. Data Conclusions • Slowest – 4 wheels…rubber • Fastest – 4 wheels…no rubber • Rubber really increased the times • Due to friction

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