Scissors (allowed as a tool only, not a construction material).Note that these are also referred to as "milkshake straws" or "smoothie straws." They are available from.Jumbo straws, approximately 1/2 inch diameter and 9 inches long (2).The maximum allowable quantity for each item is listed in parenthesis. You can only use the materials listed here. If you want to challenge yourself and compare your car's performance to other students' cars, you can follow the guidelines in the What are some common materials and designs used to build balloon cars?.What are some different ways potential energy can be stored?.For the ultimate test, you can follow a strict set of design rules used in the 2015 Engineering Challenge (see the Procedure for details). You want to design your car so it can travel as far as possible. However, when you attach the balloon to a car, like the ones shown in Figure 1, you can harness the balloon's energy to propel the car forward! The engineering goal in this project will be to design, build, and test a car that is powered by nothing but a balloon. When you just let a balloon go on its own, it tends to randomly fly around the room, and is almost impossible to steer. According to Newton's third law of motion, when air is pushed backwards out of the balloon (out the end with the opening), there must be an equal and opposite reaction force that pushes the balloon forward (the end opposite the opening).
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