you get the velocity relative to the ground by doing a vector addition of the velocity of the plane relative to the air with the velocity of the air relative to the ground.
e.g. if the plane was pointing north and had an airspeed of 200 m/s and the wind was blowing towards the north at 50 m/s the velocity of the plane relative to the ground would be 250 m/s north.
to do vector addition you draw the vectors you want to add tip to tail. the answer is the vector that joins the tail of the first vector to the tip of the last vector.
e.g. if the plane was pointing north and had an airspeed of 200 m/s and the wind was blowing towards the north at 50 m/s the velocity of the plane relative to the ground would be 250 m/s north.
to do vector addition you draw the vectors you want to add tip to tail. the answer is the vector that joins the tail of the first vector to the tip of the last vector.
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