Judy is driving fast. A strong wind is blowing from the left, but

fortunately the road is dry, so the car has no problem staying in its

lane. Suddenly, the driver ahead of Judy slows down forcing her to

step on the brakes. Judy brakes too hard; the tires lock and slide

on the pavement. Unexpectedly, the wind now easily pushes her car

sideways as though she were on ice. Why is the wind now so effective?