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Physics - Rotation Question with Solution | TestHub

PhysicsRotationTorque / angular accelerationMedium2 minQB

PhysicsMediumsingle choice

A uniform rod of mass m and length $ℓ$ is connected with two ideal strings from ends of rod as shown in figure, if tensions in strings are $T_{1}$ & $T_{2}$ respectively then :-

Options:

Answer:

Solution:

Force balance on the rod:

$T_{1} + T_{2} = m g$

Torque about the end where $T_{1}$ acts:

$T_{2} ℓ cos 3 0^{\circ} - m g \frac{ℓ}{2} cos 3 0^{\circ} = 0$

$T_{2} = \frac{m g}{2}$

$T_{1} = m g - T_{2} = \frac{m g}{2}$

Answer: D

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

⏱ 2mℹ️ Source: QB

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