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Calculating force of Air Resistance

  1. Dec 31, 2008 #1
    I'm having a little trouble calculating the force of air resistance for a bicycle.
    The formula I used is: Fd=1/2pv^2ACd .
    p= 1.3kg/m^3
    v= 13.44 meters/sec.
    A= 1.15 meters^2
    Cd= 0.9
    I got an answer, but I don't know if it is correct, can someone please verify?I got 121.52 Newtons.
  2. jcsd
  3. Dec 31, 2008 #2


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    The formula is correct, and so is your algebra. The answer is correct for a speed of 13.44m/s PROVIDED that you are using the correct value for Cd and A. Were they given to you?
  4. Dec 31, 2008 #3
    yes, they were given, thanks, i just wanted to make sure because i have no frame of reference to compare the answer i got to.
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