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Newtonian physics and highschool level models of static maechanics do not rule out lateral accelerations over 1.0 G. That is the limit for an object against a surface with a friction coefficient of 1.0 on a horizontal surface and there is absolutely no reason to think friction coefficients of rubber compounds against pavement are limited to that. Street tire rubber is hard and resilient enough to last 60 to 100 thousand kilometer road use while softer street compounds for vehicles like the NRX last 30K kilometers, stick like glue and are expensive. Likewise the coefficient of friction is a function of the asphalt surface chemistry and grit meaning a 2009 Z01 corvette has been recorded at 1.01 G and 1.3G by car magazines on different tracks on different days. Racers will tell you that time of day will affect cornering 0.2G sometimes by changing the temperature of the track. What amazes me is that a box stock Z06 from the dealers door will perform as well as it does or that a modern F1 car will atain well ove 3 Gs with aerodynamics and racing compounds and a sticky track. I pushed a CanAm 7 Liter Lola from the race track to the trailer once and it was incredible how hot, soft and sticky those monster tires were and it was very difficult to push this 2500 lb car. It was instant enlightenment that cornering starts where the rubber meets the road.
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