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Finding Force of Friction

  1. Dec 3, 2007 #1
    I have to find the force of friction against a rocket that we launched at school. How would I do that?

    I know coefficient = Friction/Fn

    I only have Fn, how do I find the frinction?

    I'm really lost :(
  2. jcsd
  3. Dec 3, 2007 #2
    I have Fg = 0.75 N, so that would be the work done against gravity, right?

    So how would I use that to find the force of friction (air resistence in this case, since the rocket is thrust upward)
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