Answer:
The car can travel at a limit of 40 km/liter on the highway.
Explanation:
We can solve this by equating the energy per liter of fuel to the product of distance and force of resistance. This means the following:
Energy = Force * Distance
(40000000 Joules) = (1000 N) * Distance
To travel the maximum amount of distance, our car needs to maintain a constant speed, where the only energy needed is to push back against air resistance and friction.
Solving the above equation, we get:
Distance = 40000000 / 1000
Distance = 40000 meters
Distance = 40 km
Thus, the car can travel 40 km/liter on the highway.
Answer:
The overall limit in distance per liter it could be driven on the highway is 40,000 m/L.
Explanation:
It was assumed the efficiency of the miracle car engine is 100%, therefore, energy input equals energy output.
Energy input = 40 MJ/L = 40×10^6 = 4×10^7 J/L
Energy output = 4×10^7 J/L = 4×10^7 Nm/L
Frictional force = 1000 N
Overall limit in distance per liter = energy output ÷ frictional force = 4×10^7 Nm/L ÷ 1000 N = 40,000 m/L
