1. Convert Units:

* Time: 3 minutes = 3 * 60 seconds = 180 seconds

* Speed: 100 km/h = 100,000 meters / 3600 seconds = 27.78 m/s (approximately)

2. Understand Acceleration:

* Acceleration is the rate of change of velocity. Since the car is coming to a stop, its acceleration will be negative (deceleration).

3. Use the Formula:

* Acceleration (a) = (Final velocity (vf) - Initial velocity (vi)) / Time (t)

4. Apply the Values:

* vf = 0 m/s (the car comes to a stop)

* vi = 27.78 m/s

* t = 180 seconds

* a = (0 - 27.78) / 180

* a = -0.154 m/s² (approximately)

Therefore, the acceleration of the car is approximately -0.154 m/s². The negative sign indicates that the car is decelerating.