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Physics - Rotation Question with Solution | TestHub

PhysicsRotationTorque / angular accelerationEasy2 minPYQ_2020

PhysicsEasysingle choice

A particle is at a distance r from the axis of rotation. A given torque $τ$ produces some angular acceleration in it. If the mass of the particle is doubled and its distance from the axis is halved, the value of torque to produce the same angular acceleration is -

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Answer:

Solution:

$I^{'} = 2 {(\frac{1}{2})}^{2} I = \frac{I}{2}$

$τ = I α$

$\Rightarrow \frac{τ^{'}}{τ} = \frac{I^{'}}{I} = \frac{τ}{2}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:RotationSubtopic:Torque / angular acceleration

⏱ 2mℹ️ Source: PYQ_2020

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