Friction - truck on a slippery road

[vlpanther211]

Homework Statement

A truck is traveling at 40 m/s on a slippery road. The driver slams on the brakes and the truck starts to skid. If the coefficient of kinetic friction between the tires and the road is 0.30, how far will the truck skid before stopping?

Homework Equations

ma=-ug
V^2 = Vintial +2at
x = (v^2 + Vintial^2)/2a

The Attempt at a Solution

would it be 40^2 divided by .6(9.8m/s)

 

[Kabbotta]

Use F=ma in the x-direction to get the acceleration, and then your third equation gets you all the way home.