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

22

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26

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Solution

The correct option is C $26$
Cage is closed so force is provided by air but ultimately force is providedas normal force because air paticles will apply normal force on the wall of the cage. So normal force required to provide acceleration of $2 m / s^{2}$ is $m . a$ $= 1 N$ .
So total weight recorded by spring is normal applied to it i.e. $25 + 1$ $= 26 N$ because acceleration is in upward direction so normal reaction required is in upward reaction amd equal and opposite normal will be applied on the base of cage .

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

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