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## Homework Statement

Driving home from school one day you spot a ball rolling out into the street (Figure 5-18). You brake for 1.15 s, slowing your 1020 kg car from 16.0 m/s to 9.50 m/s.

a) What was the average force exerted on your car during braking?

Magnitude

_____ kN

(b) How far did you travel while braking?

## Homework Equations

xf=xi+.5(vi+vf)t

vf^2=vi^2+2a(xf-xi)

## The Attempt at a Solution

I have been unable to figure out this problem!

From the information gathered, I know the following

vi=16.0

vf=9.5

t=1.15

now I do not know where to go from here, I've tried using the above formulas to find the acceleration so I can plug it into the Fnet=MA equation, but still I am kind of lost. How the heck do I find the average force exerted on the car while brakeing