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Physics - Rotation Question with Solution | TestHub

PhysicsRotationTranslational + RotationalEasy2 minQB

PhysicsEasysingle choice

A spool of mass $M$ and radius $2 R$ lies on an inclined plane as shown in figure. A light thread is wound around the connecting tube of the spool and its free end carries a weight of mass $m$ . The value of $m$ so that system is in equilibrium is

Options:

Answer:

Solution:

Equilibrium of $m$ give

$T = mg$ ( $T$ = Tension in string)

Net torque about point of contact of the spool should be
zero. Hence,

$(2 R) (Mgsinα) = TR$

or $2 Mgsinα = mg$

or $m = 2 Msinα$

Stream:JEESubject:PhysicsTopic:RotationSubtopic:Translational + Rotational

⏱ 2mℹ️ Source: QB

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