Experimental Investigation Rumbling Rubber Band Cars You are to design and build a vehicle that can be powered by a single rubber band. Design Brief The is: Dimensions and mass of vehicle is up to you. A variety of materials are available for use , but any other materials which are supplied by the students can be included (except the rubber band which can only be supplied by the school) Vehicle must have a minimum of three wheels and drive relatively straight. Method of propulsion can be wheel or axle driven or by propeller or by any other means that can be implemented by using a rubber band. Rubber band can be twisted or stretched, however, the vehicle must not be ‘sling shot’. That is, the rubber band can not be attached to anything that is not part of the car. Report A of 400-500 words is to be submitted at the time of the final test run. The report should include: Introduction: Describe background physics behind the motion of cars. Design process: The process of design, construction and testing of your car (kept in diary form showing the design process, justification, test results and consequent changes). Diagram of final construction with annotation of how it works. Alternatively labeled photographs may be just as good as a diagram. Results: What was the mass of your car? How far did your car travel? How long did it take for the entire journey. How quickly did your car reach the 2 m mark. Calculations: What was the average speed of your car over the whole journey? What was the speed during the first 2 m? What was the kinetic energy of your car during the first 2 metres? How much PE was stored in the rubber band? What % of this PE(potential energy) was converted into Kinetic Energy, the efficiency of the energy conversion. Comment on how efficient it was and where the PE not converted to KE ended up. Discussion: Describe the motion of your car by referring to its speed and acceleration during different stages of its journey Describe the energy transformations which took place as your car moved Describe the forces on the car at different stages of its journey. Include a description of how big the forces were with respect to each other. Describe any difficulties which you had in the process of your construction or measuring the performance of your car. Describe any modifications you could make to improve your car or the process of measuring. Conclusion: Consider the designs from all groups in the class. Describe the most successful car and explain why you thought it was successful. Make reference to forces or energy transformations in your explanation.
Experimental Investigation Rumbling Rubber Band Cars You are to design and build a vehicle that can be powered by a single rubber band. The Design Brief is: Dimensions and mass of vehicle is up to you. A variety of materials are available for use , but any other materials which are supplied by the students can be included (except the rubber band which can only be supplied by the school) Vehicle must have a minimum of three wheels and drive relatively straight. Method of propulsion can be wheel or axle driven or by propeller or by any other means that can be implemented by using a rubber band. Rubber band can be twisted or stretched, however, the vehicle must not be ‘sling shot’. That is, the rubber band can not be attached to anything that is not part of the car. A Report of 400-500 words is to be submitted at the time of the final test run. The report should include: Introduction: Describe background physics behind the motion of cars. Design process: The process of design, construction and testing of your car (kept in diary form showing the design process, justification, test results and consequent changes). Diagram of final construction with annotation of how it works. Alternatively labeled photographs may be just as good as a diagram. Results: What was the mass of your car? How far did your car travel? How long did it take for the entire journey. How quickly did your car reach the 2 m mark. Calculations: What was the average speed of your car over the whole journey? What was the speed during the first 2 m? What was the kinetic energy of your car during the first 2 metres? How much PE was stored in the rubber band? What % of this PE(potential energy) was converted into Kinetic Energy, the efficiency of the energy conversion. Comment on how efficient it was and where the PE not converted to KE ended up. Discussion: Describe the motion of your car by referring to its speed and acceleration during different stages of its journey Describe the energy transformations which took place as your car moved Describe the forces on the car at different stages of its journey. Include a description of how big the forces were with respect to each other. Describe any difficulties which you had in the process of your construction or measuring the performance of your car. Describe any modifications you could make to improve your car or the process of measuring. Conclusion: Consider the designs from all groups in the class. Describe the most successful car and explain why you thought it was successful. Make reference to forces or energy transformations in your explanation.