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more drag is created because the air molecules are not moving out of the way of the airplane
The best describes a flight that is approaching the speed of sound is drag . It is a kind of force.
What is speed?
The magnitude of an object's rate of change of position with time, or the magnitude of change of position per unit of time, is its speed; speed is itself a scalar quantity.
What is drag ?
Drag is a force that acts in the opposite direction of the relative motion of just about any object moving in relation to a fluid. This can occur between two layers of a fluid or a fluid as well as a solid surface.
What is force?
A force is just a factor that can impact an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. Intuitively, the force can be described as a push or even a pull.
Friction and air pressure differences are the two factors that generate drag. Putting a hand out just the window of a moving automobile and having it pull-back is a good illustration. The force of gravity is known as weight. An airplane's lifting force is what keeps it aloft. Since the air molecules do not move out of the airplane's way, additional drag is created.
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