According to the DMV, if a car is traveling at 65 miles per hour (29.1m/s) and slams on the breaks it will take the driver 4.8seconds (not counting reaction time) to bring the car to a full and complete stop. a) What is the acceleration of the car as it is stopping? b) How far does the car travel in this time
a = (-29.1 m/s)/4.8s = -29.1/4.8 m/s^2
s = vt + 1/2 at^2 so plug in your numbers