Understanding Weight and Acceleration in a Bird's Flight Using Physics

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Homework Help Overview

The discussion revolves around a physics problem involving a bird flying inside a closed cage and its effect on the weight recorded by a spring balance. The subject area includes concepts of weight, mass, and acceleration in the context of mechanics.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants explore the implications of the bird's flight on the weight measurement, questioning whether the weight recorded by the spring balance changes when the bird accelerates upward. Some participants attempt to clarify the relationship between mass and weight in a closed system.

Discussion Status

The discussion is ongoing, with various interpretations being explored. Some participants suggest that the weight remains constant due to the closed nature of the cage, while others raise questions about the bird's interaction with the cage and the implications of its flapping wings.

Contextual Notes

There is a lack of consensus regarding the interpretation of the problem, particularly concerning the effects of the bird's upward acceleration and the definition of weight in this scenario. Participants are navigating assumptions about mass conservation and the dynamics of the system.

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Homework Statement


A bird is sitting in a large closed cage which is placed on a spring balance. It records a weight of
25 N. The bird (mass = 0.5 kg) flies upward in the cage with an acceleration of 2 m/s2. The spring
balance will now record a weight of -


Homework Equations





The Attempt at a Solution


i tried by calculating the mass of the spring balnce and then calculating the weight but the answer says same as earlier!1
 
Last edited:
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the weight will be same, as the cage is closed. total mass is constant. weight = mg.
 


supratim1 said:
the weight will be same, as the cage is closed. total mass is constant. weight = mg.

bird is not sitting now i mean its flapping its wings so that it is not in contact with the bars of the cage howz mass constant then
 


Does anyone know a way out of this prob??
 


the weight of the bird is supported by flapping its wings, which creates air pressure on the bottom of the cage. mass is always conserved.
 

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