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## Homework Statement

You are driving your car and you heavily apply the brakes for a period of 2.1 seconds. The car keeps moving for a distance of 14.6m before it completely stops.

What is the acceleration (in m/s2) experienced by the car? Is it truly "acceleration"?

## Homework Equations

5 kinematic equations

## The Attempt at a Solution

I was using this : Δd

^{→}=Vf

^{→}Δt-0.5a

^{→}Δt

^{2}

14.6=0(2.1)-0.5a

^{→}(2.1

^{2})

14.6= 0-0.5a

^{→}(4.41)

I don't know what to do after that, I don't know what to do with the part of the equation with the acceleration. Am I even using the right kinematic equation?