Question

A parrot is sitting on the floor of a closed glass cage which is in a boy’s hand. If the parrot starts flying with a constant speed, the boy will feel the weight of cage as
(A) Unchanged
(B) Reduced
(C) Increased
(D) Nothing can be said

Answer 1

Hint: This question can be solved by using the concept of laws of motion. Basically there are three laws of motion on which all the classical mechanics depend. The first law of motion is based on the concept of inertia,second one depends on the concept of rate of change of momentum and the third one is based on the action reaction concept.

Complete step by step answer:
The law of motion is associated generally with three physical laws which are combined together to form a foundation for classical mechanics. It explains the relationship between the forces acting on a body and its motion. The first law of motion explains us about the qualitative characteristics of force. The second law explains us about the quantitative measurement of the force and the third law explains us about the force which has a single isolated characteristic and which does not exist.
We know that a parrot is sitting on the floor of the Cage which is made up of Glass. As the cage is held by a boy in his hand. Here we observe that the weight of the glass cage and the weight of the parrot does not Change. Now, if the parrot begins to fly inside the glass cage with a constant velocity and speed, the boy who is holding the glass cage on his hand will conclude that the air inside the glass cage is Seal packed and the parrot which is flying inside the glass cage will also make no difference in the weight of the glass cage, even though the bird is flying with a constant speed.
Therefore, from the above explanation, the correct option is (A) Unchanged.

Note: As the glass cage is completely closed and sealed. Therefore, there is no leakage of air in the glass cage.