Answer:
D. moving slow at a constant speed and traveling along a straight line
An airplane is moving at a net force of zero. This means the airplane is moving at a constant speed and traveling along a straight line.
Force is an external agent applied on any object to displace it from its position. Force is a vector quantity, so with magnitude it also requires direction. Direction is necessary to examine the effect of the force and to find the equilibrium of the force.
According to newtons law
F=ma
So if the net force id zero it means that the acceleration is zero it means the airoplane is moving at constant speed.
Thus An airplane is moving at a net force of zero. This means the airplane is moving at a constant speed and traveling along a straight line.
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