This is a confusing question please help. A plane flying to its destination must
ID: 1525990 • Letter: T
Question
This is a confusing question please help.
A plane flying to its destination must adjust for the wind speed Vag (the subscript ag = air relative to ground). The velocity of the plane relative to the air (airspeed) is Vpa (the subscript pa = plane relative to air), and the velocity of the plane relative to the ground (ground speed) is Vpg (the subscript pg = plane relative to ground). What is the relative velocity equation relating these three velocities?
Vpg = Vpa - Vag
Vpg = Vpa + Vag
Vpa = Vpg + Vag
Vag = Vpg + Vpa
Explanation / Answer
Correct option is (b)
Vpg = vpa +vag
vpg = vp -vg
vpa = vp - va
vag = va -vg
vpa +vag = vp - va +va - vg = vp - vg
Therefore vpg = vpa +vag
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