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Physics - Rotation Question with Solution | TestHub

PhysicsRotationRotational KinematicsEasy2 minPYQ_2020

PhysicsEasysingle choice

A rope is wound around a solid cylinder of mass $1 kg$ and radius $0 \cdot 4 m$ . What is the angular acceleration of cylinder, if the rope is pulled with a force of $25 N ?$ (cylinder is rotating about its own axis)

Options:

Answer:

Solution:

(A) Torque $τ = F r = 25 \times 0.4 = 10 Nm$ $I = \frac{M R ^{2}}{2} = \frac{1 \times ( 0.4 ) ^{2}}{2} = 0.08 kg - m^{2} α = \frac{τ}{I} = \frac{10}{0.08} = 125 rad / s^{2}$

Stream:MHT_CETSubject:PhysicsTopic:RotationSubtopic:Rotational Kinematics

⏱ 2mℹ️ Source: PYQ_2020

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