Consider a refueling aircraft that refuels planes midair and another plane. If the velocity of the plane?

Question

is 125 meters/second due east relative to the ground, what is the velocity of the plane being refueled relative to the
A) ground, and
B) refueling aircraft.

Correct me if I'm wrong:
The plane must have the same velocity as the refueling aircraft relative to the ground (and to the refueling aircraft itself) to keep up with it and continue going in the same direction.

Answer 1

I would say you are correct, once the two aircraft are connected.

When the receiver aircraft is approaching the refueler the approach speed will vary as it nears and should slow to the same speed as the refueling connection is made. When they disconnect the two aircraft will typically turn different directions, usually the tanker to the left and the receiver to the right.

This is done to avoid a possibility of a collision.

Answer 2

The plane being refuelled would also be 125 m/s due east relative to the ground, and would not be moving at all relative to the other plane.