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for total system of bird and cage the external forces are only gravity and spring balance force so if the bird flies gravity on the system won't change so the spring balance force also won't change as both cancel each other in two cases hence W1 must be equql to W2 i.e center of mass of bird and cage remains at rest in both cases hence W1 is equal to W2

over 11 years ago
Chinnu
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Doubts in this Question

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explanation
over 11 years - Aditya
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if we compare above case with lift,then?
over 11 years - Harshal mahajan
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how i solve it
over 11 years - Saicharan
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how ? can you give a solution for this
over 11 years - Kethu Saikumarreddy

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