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Q.

A balloon is descending with a constant acceleration g8. The mass of the balloon and its contents is M. What mass m of its contents should be released so that the balloon starts ascending with the same acceleration in magnitude? (Assume the volume of balloon as same)

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a

2M3

b

2M6

c

2M9

d

2M7

answer is C.

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Detailed Solution

(M−m)(g+a)=M(g−a)

Mg+Ma−mg−ma=Mg−Ma

m=2Ma(g+a)

 Here a=g8

m=2M9

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