[jackmott]

Cars can do more than 1G even without downforce. Sports car street tires commonly ~1.2g, race tires commonly ~1.5g+

High school friction is wrong.

Source: various of my cars (in the past, I just have lame hybrids now) and a g meter

[LeifCarrotson]

> High school friction is wrong.

No, it's at least mostly correct. High school friction says

    F = mu * W

Where F is the output force, mu is the coefficient of friction, and W is the normal force (typically equal to the weight).

If it's failed you, it's failed in failing to mention that the tire-road interface can have a coefficient of friction greater than one, and in failing to mention that the normal force can be increased with aerodynamic downforce.

[jackmott]

High school physics tends to claim that the coefficient can't be greater than one.

Source: note all the people here who thought it couldn't be greater than one.

[hx87]

How is that due to high school physics rather than naive intuition?

[Dylan16807]

Mine never implied that, and I could have easily disproved it with the grippy pads on my giant calculator.