A bird is resting on the floor of airtight box suspended from a spring balance. If the bird starts flying, then what happens to the reading?
Answer (1)
31st May, 2020
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There will be no change.Because according to newton's third law,For every action there will be equal and opposite reaction.When the bird exerts a force on the air tight container .There is no chance to act pressure inside the container ,because it is tightly closed.T he pressure will be exerted by the container opposite to the bird,which enables the bird to fly. So there will be no change in the reading.
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