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Physics - Rotation Question with Solution | TestHub

PhysicsRotationTorque / angular accelerationEasy2 minPYQ_2020

PhysicsEasysingle choice

A right triangular plate $ABC$ of mass $m$ is free to rotate in the vertical plane about a fixed horizontal axis through $A$ . It is supported by a string such that the side $AB$ is horizontal. The reaction at the support $A$ is

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Answer:

Solution:

For equilibrium of torque about A,

$(m g) \frac{l}{3} = T (l) or T = \frac{m g}{3}$

For verticle equilibrium of plate,

$R_{A} + T = m g ∴ R_{A} = \frac{2 m g}{3}$

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

⏱ 2mℹ️ Source: PYQ_2020

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