For each combination of the altitude of the flight and aircraft weight, in the scale of minimum to maximum speed there is
- Such an approach angle at which the resistance force is equal to the string generated by the engines and it is possible to level flight
- Such a tilt that ensures that the lift force is equal to the weight and it is possible to level flight
- An approach angle at which the lift force is equal to the weight and it is possible to level flightCorrect answer
- Such an approach angle at which the lift force equals the weight times the cosine of the angle of attack, and it is possible to level flight
Explanation
In steady level flight, the Lift force must equal the Weight of the aircraft.
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