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Air Resistance of a car

  1. Nov 18, 2005 #1
    The Air Resistance of a car grows proportional to the square of the velocity. On a certain car is the air resistance 0,18kN when the velocity is 54km/h.

    So the problem is ..

    What is the air resistance when the velocity is 90 km/h?

    How high is the velocity when the air resistance is 0,30kN?

    I don't understand how to do this please help me...
  2. jcsd
  3. Nov 18, 2005 #2


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    Staff Emeritus
    Science Advisor

    Write an equation which gives the relatioship for Air Resistance and the square of velocity.

    Then solve for the constant since one is given a value for air resistance and the corresponding velocity.
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