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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