We want more friction here

It is observed that coefficient of kinetic friction is usually less compared to static friction. Some approximate data is given below:

Surfaces μ static \mu_{\text{static}} μ kinetic \mu_{\text{kinetic}}
Tire on concrete 1.00 1.00 0.80 0.80
Tire on wet road 0.60 0.60 0.40 0.40
Tire on snow 0.30 0.30 0.20 0.20

You are driving a car. If in a hurry, should you apply the brakes or lock the tyres?

Lock Tyres Apply Breaks

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