Question

3. [1pt]
The energy stored in gasoline is approximately 3.50×10⁴ kJ per litre; 25% of this is converted into useful work by an automobile. When you drive on the highway at constant speed, most of the work the car does is against the drag force. Assuming there is no wind, how far can the car travel on a level road at 28.2 m/s with 11 L of gasoline? The force due to air resistance is F = Dv², where D = 0.915 kg/m, and v is the velocity in m/s.

4. [1pt]
If you decide to use side roads and travel at half the speed, how far can you go with the same amount of gas?

Answer 1