The rear-wheel-drive car has a driving force of 1400 N per tire.
The air resistance is 800N. The rolling resistance is 60N per tire. The grade resistance is 1900N. What is the Car’s driving force shortfall?
The driving force shortfall of a car can be calculated by subtracting the total resistance from the driving force. So, the total resistance of the car is the sum of air resistance, rolling resistance, and grade resistance, which is:
Total resistance = Air resistance + Rolling resistance + Grade resistance
= 800N + (60N x 2 tires) + 1900N
= 2980N
And the total driving force generated by the car is:
Driving force = Driving force per tire x Number of drive tires
= 1400N x 2 tires
= 2800N
Therefore, the driving force shortfall can be calculated by subtracting the total resistance from the driving force:
Driving force shortfall = Driving force - Total resistance
= 2800N - 2980N
= -180N
The result is a negative number, which indicates that the car's driving force is insufficient to overcome the total resistance. Therefore, the car may struggle to climb steep hills or accelerate quickly.