Here's why:

* Kinetic Friction: This type of friction occurs when two surfaces are in motion relative to each other.

* Static Friction: This type of friction occurs when two surfaces are at rest relative to each other.

When a car is skidding, its tires are sliding across the ice, meaning the surfaces are in motion. This is why the friction present is kinetic friction.

It's important to note that kinetic friction is generally weaker than static friction. This is why it's much harder to stop a car on an icy road. The ice has a low coefficient of friction, meaning there's less resistance to the motion of the tires.