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## Homework Statement

You are driving a 2090 kg car at a constant speed of 22.2 m/s along an icy, but straight and level road. While approaching a traffic light, it turns red. You slam on the breaks. Your wheels lock, the tires begin skidding, and the car slides to a halt in a distance of 64.9 m. What is the coefficient of sliding friction (μ) between your tires and the icy roadbed?

## Homework Equations

vf^2=vi^2=2ax

F=ma

## The Attempt at a Solution

vf^2=vi^2=2ax

0= 22.2^2+2a64.9

a=-3.796 m/s^2

F= sum of forces/ W

= -3.796(2090)/2090(9.8)

= -.387

?

help appreciated