We know that the final velocity for constantly accelerated motion can be found by multiplying the acceleration times time and adding the result to the initial velocity, vf=vi+at. An car is broug...We know that the final velocity for constantly accelerated motion can be found by multiplying the acceleration times time and adding the result to the initial velocity, vf=vi+at. An car is brought to rest in a distance of 484 m using a constant acceleration of -8.0 m/s 2 . What was the velocity of the car when the acceleration first began?