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Science Fair 2013

Science Fair 2013. Aaron Heo Period 6. Question. Which combination will allow a car to travel faster around a track?. Hypothesis. The combination with three wheels and no rubber on the front wheel will complete a lap in the shortest amount of time. Materials.

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Science Fair 2013

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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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