A car is moving at a velocity of 75 m/s and comes to a complete stop over 15 seconds. What is the cars acceleration?

The car has an acceleration of -5m/s² or a deceleration of 5m/s²

Explanation:

Given parameters:

 Initial velocity = 75m/s

 Final velocity  = 0m/s

 Time taken  = 15s

Unknown:

Acceleration of the car = ?

Solution:

Acceleration is the rate of change of velocity with time.

 Mathematically;

      Acceleration  =  

  Insert parameters and solve;

     Acceleration  =   = -5m/s²

The car has an acceleration of -5m/s² or a deceleration of 5m/s²