The tire have a driving force of 2800N.
The air resistance is 800N and the total rolling resistance is 240N. The gravitational force is 1900N.
What is the car’s driving force shortfall?
The total resistance to the car's motion is the sum of air resistance and rolling resistance, which gives 800N + 240N = 1040N.
The net driving force on the car is the difference between the driving force and the total resistance to motion, which is 2800N - 1040N = 1760N.
The driving force shortfall is the difference between the net driving force and the gravitational force acting on the car, which is 1760N - 1900N = -140N.
Therefore, the car's driving force is 140N less than what is needed to overcome the total resistance and gravity acting on it.