Driving by increasing the speed from 0 mph to 80 mph in the first hour and then drove with constant speed of 80 km per hour for another one hour, then reduce the speed until the car stopped in 2 hours.
Driving the increase speed of 0 kilometers per hour until 80 kilometers per hour at a time 1 hours.The drive with a constant speed 80 kilometers per hour for another 1 hours. Then lower the speed down until the stop.Time 2 hours.