the normal force acting upon the car is best represented by arrow \nthe force of gravity acting upon the…

Explanation:

Step1: Define normal force

The normal force is perpendicular to the surface the object is on. For the car on the horizontal surface, it acts upwards. So the normal force acting on the car is best represented by arrow A.

Step2: Define gravitational - force

The force of gravity acts downwards towards the center of the Earth. For the washers, the gravitational - force acts downwards. So the force of gravity acting on the washers is best represented by arrow D.

Step3: Define applied force

The applied force on the car is the force that causes the car to move horizontally. Here, it is the tension in the string pulling the car horizontally. So the applied force on the car is best represented by arrow C.

Answer:

The normal force acting upon the car is best represented by arrow A. The force of gravity acting upon the washers is best represented by arrow D. The applied force on the car is best represented by arrow C.