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Q. 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 $m=0.5\, kg$ ) flies upward in the cage with an acceleration of $2 \,m / s ^{2}$. The spring balance will now record a weight of

Laws of Motion

Solution:

Reading $=$ Weight of cage $+$ Reaction by bird
$=20+0.5(10+2)=26\, N $