You are driving a 2460.0 kg car at a constant speed of 14.0 m/s along an icy, but straight, level road. As you approach an intersection, the traffic light turns red. You slam on the brakes. Your wheels lock, the tires begin skidding, and the car slides to a halt in a distance of 24.5 m. What is the coefficient of kinetic friction between your tires and the icy road?

We won't do you homework for you, but will healp you along if you show us how you have attempted to solve this yourself and where you got stuck. But here is a hint - from the data you've been given you can calculate the car's acceleration, and from that the magnitude of the friction force. Can you take it from there?

Give us the definition of kinetic friction. From it you will see how to get to the answer.