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Physics - Rotation Question with Solution | TestHub

PhysicsRotationAngular momentumMedium2 minPYQ_2018

PhysicsMediumsingle choice

A solid sphere is rotating freely about its symmetric axis in free space. The radius of the sphere is increased keeping its mass same. Which of the following physical quantities would remain constant for the sphere?NEET 2018

Options:

Answer:

Solution:

$∵ τ_{e x t} = \frac{d \vec{L}}{d t}$

So, when $τ_{e x t} = 0 \Rightarrow \frac{d \vec{L}}{d t} = 0$

$\Rightarrow \vec{L} =$ constant

So angular momentum remains constant.

Stream:NEETSubject:PhysicsTopic:RotationSubtopic:Angular momentum

⏱ 2mℹ️ Source: PYQ_2018

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