currawong
Have you forgotten everything you learnt in BAK, Lift = weight, Thrust = Drag etc etc. Yes the pigeon does derive live from the air but also exerts a downward force in the form of weight because of its mass and gravity. This extra weight is displaced amongst the air mass in the cabin of the aircraft and therefore the weight of the aircraft doesn’t change. If you don’t believe me ask yourself the simple question. Where does the weight of the bird go? While it is still in the Earths gravity it will have weight because of its mass.
Of course the total mass will not change. Nor would it in zero gravity. Weight will change, mass will not.
Yes very true but gravity hasn't changed therefore neither has the weight.
W = mg
Where:
o W = Weight: The force of gravity pulling an object downward at the surface of the earth
o m = mass: measured in kg
o g = gravity: measured at 9.81 m/s/s
Therefore while a bird with a mass of 1.5kg has a force of gravity acting on it, it has weight. Simple law of physics.
