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Drag Forces

  1. Jul 29, 2009 #1
    1. The problem statement, all variables and given/known data

    Marks: 1 In a recent mystery, the hero saves himself by spreading out a windshield tarpaulin to reduce his terminal velocity. A skydiver of 75 kg mass has a terminal velocity of 60 m/s. If the hero has the same 75 kg mass, the same density as the sky diver, and a drag coefficient twice as large with the tarp, by what factor is his effective area greater than the 0.70 m2 area of the skydiver?

    2. Relevant equations

    Drag force= 1/2DPairAV^2

    3. The attempt at a solution
     
  2. jcsd
  3. Jul 29, 2009 #2

    Hootenanny

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    You seem to have forgotten to complete section three.
     
    Last edited: Jul 29, 2009
  4. Jul 29, 2009 #3
    yea i didnt know what to do for the question, i cant get the density of air or drag coeffient so i cant work anything out by rearranging the equation for A
     
  5. Jul 29, 2009 #4

    Hootenanny

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    HINT: What do you know about the drag force in both cases?
     
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