A bird is sitting on the floor of a closed glass cage and the cage is in the hand of a girl. Will the girl experience any change in the weight of the cage when the bird (i) starts flying in the cage with a constant velocity (ii) flies upwards with acceleration (iii) flies downwards with acceleration?
In a closed glass cage, air inside is bound with the cage, (i) There would be no change in weight of the cage if the bird flies with a constant velocity. (ii) The cage becomes heavier, when bird flies upwards with acceleration. (iii) The cage appears lighter, when bird flies downwards with acceleration.
