Question

a car is driving at 35 m/s when the driver hits the breaks causing the car to accelerate at -5 m/s How long will the car take to stop show your work

Answer 1

I believe that acceleration is -5 m/s^2 (units!!!)
v= vₒ - a•t.
t – (v - vₒ)/a = 0-35/(-5) = 7 s.

Answer 2

t = (v - vₒ)/a = 0-35/(-5) = 7 s.