Final answer:
The time it takes to travel from 0-400 km/h and 400 km/h - 0 is not equal. The time taken to accelerate from 0 to 400 km/h will be longer than the time taken to decelerate from 400 km/h to 0.
Step-by-step explanation:
The time it takes to travel from 0-400 km/h and 400 km/h - 0 is not equal. The time taken to accelerate from 0 to 400 km/h will be longer than the time taken to decelerate from 400 km/h to 0. This is because the rate of acceleration is higher at the beginning than when decelerating.
When accelerating from 0 to 400 km/h, the velocity is increasing, so the car needs more time to reach the desired speed. On the other hand, when decelerating from 400 km/h to 0, the velocity is decreasing, so the car requires less time to come to a stop.
Therefore, the time taken for each scenario would not be equal.