it knackers up the tyres. this is because the wheels are moving at a phenomenal rate and creates friction on the tarmac. to get and understanding of what it feels like rub your hands together hard. now think of this 5000x a second.
Friction and Gravitational forces
yes
ball sack
Yes, it keeps them on the road.
When it comes to tires, it allows the cars to corner, brake and accelerate better.
A burn out will ruin tires on race cars by burning up the rubber. The rubber of the tires will get worn from the friction of the pavement causing the tires to tear.
Cars don't get better gas or mileage.
If race cars didn't race they wouldn't be race cars.
Without gravity, and friction the race car would be flying everywhere and would slide off of the track.
in many different ways including the whole braking system, but engine friction causes lose in MPG's because the engine is working against itself
A variable that has no affect on friction is Inertia
F1 cars need friction for their brakes, if they didn't have friction on there brakes then it wouldn't be able to brake.