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Physics - Rotation Question with Solution | TestHub

PhysicsRotationRotational KinematicsEasy2 minPYQ_2020

PhysicsEasysingle choice

A body rolls down an inclined plane. If its kinetic energy of rotation is $40 %$ of its kinetic energy of translation, then the body is

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Answer:

Solution:

$\frac{1}{2} I ω^{2} = 40 % o f \frac{1}{2} m v^{2}$

$\frac{1}{2} I ω^{2} = \frac{40}{100} (\frac{1}{2} m r^{2} ω^{2})$

$I = \frac{2}{5} m r^{2}$

So, the body is solid sphere.

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:RotationSubtopic:Rotational Kinematics

⏱ 2mℹ️ Source: PYQ_2020

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