|Jan4-13, 02:55 AM||#1|
Correlation between friction force and surface area
As far as I know, friction force is equal to the product of the normal force and coefficient of friction, hence is independent of surface area.
So why is it that race cars have wider tyres than conventional vehicles?
|Jan4-13, 02:32 PM||#2|
The rubber compound is softer and stickier in racing tires (I'm in North America!), and can't handle the higher internal pressure that a street tire would, so to support the vehicle, you need to have a larger contact patch, and hence wider tires.
Take the surface contact patch area and multiply by the tire pressure to estimate the load it can support. PA = F
|Jan7-13, 07:25 AM||#3|
There may also be other benefits to wider tyres like reduced wear rates (allows you to use softer rubbers) and less overheating.
|friction, surface area|
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