A bird weighs 2 kg and is inside an airtight cage of 1 kg. If its starts to fly, then what is the weight of the bird and cage assembly?

A bird weighs 2 kg and is inside an airtight cage of 1 kg. If its star

1.	A bird weighs 2 kg and is inside an airtight cage of 1 kg. If its starts to fly, then what is the weight of the bird and cage assembly?
Answer» 3 kg 2 kg 1 kg NONE of these Solution :When the bird flies, the upthrust on it is equal and opposite to the down thrust on the CAGE. THEREFORE, the weight of the ASSEMBLY remains unchanged.