In aerodynamics, the lower the _____, the lower the thrust required to counteract it.

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Multiple Choice

In aerodynamics, the lower the _____, the lower the thrust required to counteract it.

Explanation:
Thrust is the forward force that must overcome aerodynamic drag to keep the airplane moving at a given speed. In steady, level flight, thrust and drag balance, so when drag goes down, the engine needs less thrust to maintain that speed. Drag is the resistance from air acting opposite the flight path, including parasite drag from the aircraft’s shape and induced drag associated with generating lift. Lift and weight are handled separately (lift balances weight), but thrust’s job is to counteract drag rather than lift or weight. So lowering drag directly lowers the thrust required to counteract it.

Thrust is the forward force that must overcome aerodynamic drag to keep the airplane moving at a given speed. In steady, level flight, thrust and drag balance, so when drag goes down, the engine needs less thrust to maintain that speed. Drag is the resistance from air acting opposite the flight path, including parasite drag from the aircraft’s shape and induced drag associated with generating lift. Lift and weight are handled separately (lift balances weight), but thrust’s job is to counteract drag rather than lift or weight. So lowering drag directly lowers the thrust required to counteract it.

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