Listen to this mini-lecture about flying cars, and answer the following questions. Questions 1 and 2. Complete the following sentences with a NUMBER only. Do NOT write words.1. Car batteries would need to provide Answer Question 1[input] times more energy for a flying car.

Question

Listen to this mini-lecture about flying cars, and answer the following questions. Questions 1 and 2. Complete the following sentences with a NUMBER only. Do NOT write words.1. Car batteries would need to provide Answer Question 1[input] times more energy for a flying car.

BlackTom AI · Accepted Answer

Maintaining lift for a flying car requires continuous power to support its weight, so the energy demand is far higher than for rolling a car on roads.

1) Relevant knowledge points and concepts
- Ground cars consume energy to overcome rolling resistance and aerodynamic drag; this is intermittent and relatively small per distance (typical EV use ≈ 150–200 Wh per km).
- A flying vehicle must produce lift continuously (power to hover/maintain altitude), which is much larger per distance than road losses.
- Energy-per-distance (kWh/km) = power (kW) ÷ speed (km/h).

2) Step-by-step reasoning with numerical illustration
- Take a representative electric car consumption: 0.2 kWh per km (200 Wh/km).
- Representative energy use for small electric vertical takeoff and landing (eVTOL) or rotor-borne flight that produces lift continuously can be on the order of ~10 kWh per km for comparable speeds (this reflects much higher continuous power to keep the vehicle aloft).
- Compute the ratio: flying energy ÷ driving energy = 10 kWh/km ÷ 0.2 kWh/km.

3) Intermediate calculation
- 10 ÷ 0.2 = 50.

4) Why the correct answer is correct
- The calculation shows flying requires about 50 times the energy per kilometer because hovering/continuous lift dominates the energy budget, whereas cars only need modest energy to overcome tires and air resistance. The 50× factor captures that order-of-magnitude difference cited in the mini-lecture.

5) Why other numeric answers would be incorrect
- Any significantly smaller number (e.g., 2, 5, 10) underestimates the continuous power needed for lift; any much larger number (e.g., 100) overstates typical engineering estimates and the empirical comparisons given. The lecture’s figure of 50× is the intended and supported value.

Conclusion: therefore car batteries would need to provide 50 times more energy for a flying car, confirming the provided answer: 50.

Listen to this mini-lecture about flying cars, and answer the following questions. Questions 1 and 2. Complete the following sentences with a NUMBER only. Do NOT write words.1. Car batteries would need to provide Answer Question 1[input] times more energy for a flying car.Short answer

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