1. The problem statement, all variables and given/known data A car starts from rest and travels for 5.5 s with a uniform acceleration of +1.4 m/s2. The driver then applies the brakes, causing a uniform acceleration of -1.9 m/s2. The breaks are applied for 1.70 s. (a) How fast is the car going at the end of the braking period? 4.47 m/s (I got this part) (b) How far has the car gone from its start? ?????? m 2. Relevant equations 1) V=Vi + at 2) x=Vit + 1/2at^2 3) V^2=Vi^2 + 2ax 4) a=V/t 5) v=x/t 3. The attempt at a solution Vf^2=Vi^2+2a(x) 4.47^2=7.7^2+2(1.4)(x) -14.04=X I know this obviously can't be the answer. I'm just confused as to how to do this because there is two different accelerations. Do i find the avg acceleration by adding them up and dividing by two or do i find the displacement before braking then subtract the displacement after braking? I'm not sure which formula to use?