Answer:
If there is change in speed per unit time
Step-by-step explanation:
Acceleration of a car is found by dividing the change in velocity by the time taken. Therefore, acceleration is defined as the rate of change of speed per unit time. The change in velocity is given by subtracting the initial speed from the final speed. If the final speed is less than the initial speed, the car will be decelerating but if the final velocity is greater than the initial velocity, then the car accelerates. Time is normally measured in seconds, using a stopwatch.