Four basic forces acting on an airplane while in flight lift weight drag and thrust these four forces and their directions are indicated below if the thrust acting on an airplane is greater than the drag then

the airplane will accelerate forward.

Explanation:

An object will move at a constant speed unless an unbalanced force acts on it. An unbalanced force acting on an object changes its speed, direction of motion, or both.

As long as the thrust and drag are equal, the airplane will move at a constant speed. But if the thrust is greater than the drag, then the airplane will accelerate forward.

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