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Physics - Rotation Question with Solution | TestHub

PhysicsRotationRotational KinematicsMedium2 minPYQ_2021

PhysicsMediumsingle choice

A molecule consists of two atoms each of mass ' $m$ ' and separated by a distance ' $d$ '. At room temperature, if the average rotational kinetic energy is ' $E$ ' then the angular frequency is

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Solution:

$E = \frac{1}{2} I ω^{2} I = 2 m (\frac{d}{2})^{2} = \frac{m ^{2}}{2} ∴ E = \frac{1}{2} \times \frac{m ^{2}}{2} \cdot ω^{2} = \frac{m ^{2}}{4} \cdot ω^{2} ∴ ω^{2} = \frac{4 E}{m d ^{2}} ∴ ω = \frac{2}{d} \frac{E}{m}$

Stream:MHT_CETSubject:PhysicsTopic:RotationSubtopic:Rotational Kinematics

⏱ 2mℹ️ Source: PYQ_2021

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