Physics - Rotation Question with Solution | TestHub

PhysicsRotationTorque / angular accelerationEasy2 minPYQ_2020

PhysicsEasysingle choice

A uniform disc of mass $M$ and radius $R$ is hinged at its centre $C$ . A force $F$ is applied on the disc as shown. At this instant, angular acceleration of the disc is

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Answer:

Solution:

Given,

Mass of uniform disc $= M$

Radius of uniform disc $= R$

Applied force on disc $= F$

According to the question, we can draw the diagram as following

We know that, $τ = I α$

$\Rightarrow F \sin 30 ° R = \frac{M R^{2}}{2} α$

$\Rightarrow F \times \frac{1}{2} \times R = \frac{M R^{2}}{2} α$

$\Rightarrow α = \frac{F}{M R}$

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

⏱ 2mℹ️ Source: PYQ_2020

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