A bird is sitting in a large closed cage which is placed on a spring balance. It records a weight of

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4-1.Newton's Laws of Motion

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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 $25\,N$. 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 ........ $N$

$24$

$25$

$26$

$27$

Solution

(b)Since the cage is closed and we can treat bird, cage and the air as a closed (isolated) system. In this condition the force applied by the bird on cage is an internal force, due to this the reading of spring balance will not change.

Standard 11

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(AIIMS-2004)

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 ........ $N$

Solution

Similar Questions

A mass of $1 kg$ is suspended by a string $A$. Another string $C$ is connected to its lower end (see figure)., if the string $C$ is stretched slowly, then

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$Assertion$ : The driver in a vehicle moving with a constant speed on a straight road is in a noninertial frame of reference. $Reason$ : A reference frame in which Newton's laws of motion are applicable is non-inertial.

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$Assertion$ : The driver in a vehicle moving with a constant speed on a straight road is in a noninertial frame of reference.
$Reason$ : A reference frame in which Newton's laws of motion are applicable is non-inertial.