Question

a bird weighs 2kg and is inside a cage of 1kg . if the bird starts flying , then what is the weight of the bird and cage assembly ?​

Answer 1

Answer:

3 kg

Explanation:

When the bird flies, it pushes air down to balance its weight. So the weight of the bird and closed cage assembly remains unchanged

2+1 = 3

Answer 2

it is obvious that weight of cage remains unchanged..i.e.1 kg

and also weight of bird remains unchanged..i.e, 2 kg

thus weight of assembly will be 3 kg