Physics - Rotation Question with Solution | TestHub

PhysicsRotationMiscellaneousEasy2 minPYQ_2020
PhysicsEasysingle choice

LetIbe the moment of inertia of a uniform square plate about an axisABthat passes through its centre and is parallel to two of its sides.CDis a line in the plane of the plate that passes through the centre of the plate and makes an angleθwithAB. The moment of inertia of the plate about the axisCDis then equal to

Options:

Answer:
A
Solution:

From symmetry IAB=IA'B' and ICD=IC'D' 

From theorem of perpendicular axes

Izz=IAB+IA'B'=ICD+IC'D'

Izz=2IAB

Izz=2ICD

∴ICD=IC'D'

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:RotationSubtopic:Miscellaneous
⏱ 2mℹ️ Source: PYQ_2020

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