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# Pressure, force and area watch

1. A car of weight 12000 N is stationary on a horizontal road. The four wheels of the car are fitted with air-filled tyres. The pressure of the air in each tyre is 3 + 10^5 N m^-2. Estimate the area of contact between each tyre and the road surface.

Any help?
2. What's the definition of pressure?

What information are you given?
3. Well I thought about doing just 12000/(3x10^5).. As this would give me the pressure.. But the answer just didnt seem right, 0.04?
4. (Original post by dancing.barefoot)
Well I thought about doing just 12000/(3x10^5).. As this would give me the pressure.. But the answer just didnt seem right, 0.04?
Don't forget there are 4 tyres and you want the area of contact for each tyre, not the total area.

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Updated: February 10, 2010
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