Acar traveling at 25 m/s starts to decelerate steadily. it comes to a complete stop in 6 seconds. what is its acceleration? your question 2 options: answer units

Since the acceleration of the car is constant, the car is moving by uniformly accelerated motion, and the velocity of the car at time t can be written as

where  is the initial velocity of the car
a is the acceleration
t is the time
At time , the velocity of the car is zero: , so we can re-arrange the previous formula to get the acceleration of the car

and the negative sign means the direction of the acceleration is against the direction of motion of the car (in fact, the car is decelerating).