When the acceleration of a car has a negative number (value), it simply means that the car is experiencing a deceleration.
Given the following data:
An average acceleration can be defined as the rate of change of velocity of an object with respect to time and it is measured in meter per seconds square.
In Science, the average acceleration of an object is calculated by subtracting its initial velocity from the final velocity and dividing by the change in time for the given interval.
Mathematically, average acceleration is given by this formula:
[tex]a=\frac{V\;-\;U}{t_f - t_i} [/tex]
Where:
Note: The parameters given are incomplete and as such the average acceleration cannot be determined in this scenario.
Also, if the acceleration of this car has a negative number (value), it simply means that the car is experiencing a deceleration.
Read more on acceleration here: https://brainly.com/question/24728358