Respuesta :
Time:
The time of the flight is changing each and every second so it is not constant.
Distance:
The distance of the flight is also changing as as plane travels in air
Velocity:
The velocity of the plane would remain constant if we ignore take off and landing.
Temperature:
The temperature also changes during the flight as airplane is up in the air temperature decreases and as it goes down it rises
Correct answer choice is:
Velocity.
Explanation:
The velocity remains constant throughout the journey because the airplane can not reduce its velocity to maintain the balance in the air and to keep on moving.
In terms of plane cruising, the two central forces changing its velocity ahead are pull and thrust. At a fixed height, when the force of thrust equals the opposite force of resistance, then the plane will undergo consistent movement in one direction. This can be additionally defined by Newton's First Law.