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Gauge Pressure of Tires

  1. Mar 5, 2010 #1
    1. The problem statement, all variables and given/known data

    The weight of a 1142-kg car is supported equally by the four tires, which are inflated to the same gauge pressure. What gauge pressure is required so the area of contact of each tire with the road is 96.5 cm^2?

    W = 1142 kg
    A = 96.5 cm^2
    2. Relevant equations

    No idea

    3. The attempt at a solution

    None.


    Can someone lead me in the right direction for this question? Any hints? Ive never seen a question like this before
     
  2. jcsd
  3. Mar 5, 2010 #2
    You can draw a free body diagram of the tyres(assumed massless) and represent the forces. You know it is in equilibrium.
    The clincher: Pressure = Force*Area
     
  4. Mar 7, 2010 #3
    Oh so sorry. Its force = pressure*area.
     
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