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the gauge pressure is both tyres of a bi...

the gauge pressure is both tyres of a bicycle is 690 k Pa. If the bicycle and the rider have a combined mass of 90 kg. what is the area of contact of each tyre with the ground? (assume that each tyre supports half the total weight of the bicycle.)

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As `F=(1)/(2)(90)(9.8)=441N`,`P=690xx10^3Pa`,`A=(F)/(P)=(441N)/(690xx10^3(N)/(m^2))=6.39xx10^-4m^2`
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