Balloon Powered Race Car Lab
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- Delilah Powell
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1 Balloon Powered Race Car Lab Objectives To create a balloon powered racecar for maximum speed and distance; and use the speed formula. V=d/t Materials 9-inch balloon(s) is mandatory. Rules Groups: 2 people design 1 car, 3 people must design 2 different cars (must be completely different in design). Detailed outline of car construction, including two drawings of the car (top and side views) and labeling materials on the car. This will include materials to be used and the general design of your car. The car must be powered by no more than 2 9 balloons. You can build the car out of anything, but remember, you cannot exceed $5.00. Hints: You will bring materials from home to assemble your car in class. It must have at least 3 wheels. Wheels are defined as anything that is round and goes around. The wheels cannot be wheels from a toy car. They must be made of something that was not originally meant to be used as wheels. The car may not leave the ground. Cannot cost more than $5.00 to build. Think lightweight (it s hard to get a large mass moving) Axle and wheel movement should be smooth with little friction RACE WE MUST! Make sure wheels are straight so car travels in a straight line Traction between wheels and floor is important (need to have some friction) Race Day Procedure 1. Using your RACE DAY SHEET provided, calculate 5 speed trials of your car. Calculate the distance your car travelled, while one partner records the time. Time will be recorded on GO and end when the car stops. 2. Record all of your results and do an average of the 5 speed trials to find the average speed of your balloon-powered car. 3. On race day a track area will be set up (most likely our classroom). 4. Answer your lab questions in full sentences.
2 5. Cars that follow all of the rules will be eligible for awards. 6. Winning cars will be displayed in the lobby, as well as on our web page! Awards Awards will be given in three categories: Best design Fastest car (in 5 meters) Furthest distance travelled Lab Questions: 1. Did your car work the first time? If not, what did you do to modify it? Explain how that worked. 2. If you could make more improvements on your car, what would you do? 3. Describe how the balloon supplied energy to your car. 4. Was it difficult to calculate the average speed of your car? Why or why not? 5. What factors/things influenced the speed of your car?
3 6. Give TWO tips or pieces of advice to someone who had to construct a balloon-powered car? 7. What did you learn from building and testing your balloon car? Lab Evaluation Questionnaire: I. What did you like best about the lab? Be specific and tell why. II. Which part did you find to be the most difficult? Be specific and tell why. III. If you were able to repeat the lab, what would you do to improve it? Be as specific as you can and remember no experiment it ever perfect! (Remember our potato experiment)
4 NAMES: RACE DAY WORKSHEET: TRIAL # Distance (meters, cm, mm) Time (Seconds) Speed (v=d/t) AVERAGE Be sure to include all units!
5 Grading Rubric: Lab write-up Observations and data Point Description value 15 Completed data table, Correct calculations, thorough thoughtful process, time commitment Conclusion 10 What went wrong? How your design changed; what you changed. Relate ideas back to your hypothesis. Procedure/Materials 10 Detailed, labeled drawings of car (including two drawings of the car (top and side views)), list of material used. Problem/hypothesis 5 Problem/hypothesis clearly stated Points earned Questions 20 Answered all questions correctly, with supporting evidence and thoughtful responses. Total Points /60
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