Answer:
Since the car comes uniformly to a stop, the force that acts on the vehicle is the net force whose magnitude is equal to 1320 N.
Step-by-step explanation:
The force acting on the vehicle is given:

Where:
m: is the mass = 1100 kg
a: is the acceleration = -1.2 m/s²
We can find the magnitude of the net force:

Since the car comes uniformly to a stop, the force that acts on the vehicle is the net force calculated above.
I hope it helps you!