The average velocity of a car is the total displacement of the car divided by the total time taken to cover that displacement. In other words, it is the average rate of change of position of the car over a given time interval. Velocity is a vector quantity, which means it has both magnitude and direction.
The average acceleration of a car, on the other hand, is the rate of change of velocity of the car over a given time interval. Acceleration is also a vector quantity and is defined as the change in velocity divided by the change in time.
Both average velocity and average acceleration can vary greatly depending on the specific circumstances of the car's motion, such as the car's initial and final velocities, the distance covered, and the time taken. To calculate these values, you need to know the displacement or change in position and the corresponding time intervals.