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Physics - Rotation Question with Solution | TestHub

PhysicsRotationRotational KinematicsEasy2 minPYQ_2020

PhysicsEasysingle choice

A disc of mass $4 k g$ and of radius $1 m$ rolls on a horizontal surface without slipping such that the velocity of its centre of mass is $10 cm \sec^{- 1}$ . Its rotational kinetic energy is

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Answer:

Solution:

${KE}_{rotational} = \frac{1}{2} {Iω}^{2}$

${KE}_{rotational} = \frac{1}{2} (\frac{1}{2} (4) {(1)}^{2}) {(0 .1)}^{2}$

${KE}_{rotational} = 0 .01 J$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:RotationSubtopic:Rotational Kinematics

⏱ 2mℹ️ Source: PYQ_2020

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