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devnihtin (anonymous) doubts approved

I am learning basics of physics, I have a doubt regarding air resistance.

Plane 1 and Plane 2 have same mass and surface area.

If plane 1 starts its flight by applying 500N force (numbers are rough and just for illustration), Then it would accelerate. But when speed increases – air resistance increases, if the plane applies the same 500N force throughout its Flight then soon acceleration decreases and the plane will reach terminal velocity due to the opposing force of air resistance. ( I have applied Newtons second Law )

If plane 2 starts its Flight with 1000N force, then it would accelerate more than Plane 1. As the speed of plane 2 increases faster than plane 1 – so will its air resistance. If the flight applies the same 1000N force throughout its flight – eventually its acceleration decreases and the plane will reach terminal velocity due to the opposing force of air resistance. ( I have applied Newtons second Law )

So how come two flights with different force reach their destination at the same time according to Newton’s Law???