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**[SOLVED] Physics 11 Speed and acceleraton**

## Homework Statement

The brakes on a car permit it to decelerate at the rate of -8.0m/s^2. How much distance is required to stop this car when it is travelling 60.0km/hr?

The answer given is 173.6m

## Homework Equations

A=V/T

D=RT

## The Attempt at a Solution

I solved it this way

60km/h = 16.667m/s

A=V/T 16.667m/s / -.80m/s^2 = 20.834 seconds

D=RT 16.667m/s x 20.834seconds = 347.24m

This is wrong and I do not understand why. Am I doing it right or is the answer wrong?