Final answer:
A car maintaining a constant velocity of 120 km/h for 10 seconds has an acceleration of 0 m/s² because its velocity is not changing.
Step-by-step explanation:
The question is asking about the acceleration of a car that maintains a constant velocity of 120 km/h for 10 s. Acceleration is defined as the rate of change of velocity with time. The acceleration of a car that maintains a constant velocity of 120 km/h for 10 seconds is zero. Acceleration is defined as the rate of change of velocity, and in this case, the velocity of the car is constant. If a car's velocity is constant, it means there is no change in velocity over time, and therefore, the acceleration of the car is 0 m/s².