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B Building a Balloon Car

  1. Feb 17, 2017 #1
    This car is a balloon powered car with no outside power. I already have my sign, just need to know a few things:
    What is a relatively strong but light material I could use for this?
    What type of wheels create the least amount of rolling friction?
    How can I male the Initial acceleration as fast as possible?
  2. jcsd
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