A driver of a car traveling at 17.4 m/s applies

Question

the brakes, causing a uniform deceleration of
1.8 m/s2.
How long does it take the car to accelerate
to a final speed of 13.4 m/s?
Answer in units of s

Answer 1

t = (Vf - Vo) / a,
t = (13.4 - 17.4) / -1.8 = 2.22s.