Physics - Rotation Question with Solution | TestHub
PhysicsRotationMiscellaneousMedium2 minQB
PhysicsMediumsingle choice
A uniform disc has mass M and radius a. Its moment of inertia about the shown tangent axis XY is I. Find its moment of inertia about an axis through O and perpendicular to the disc.
Options:
Answer:
B
Solution:
For the disc, I about a central diameter is Ma²/4.
The axis XY is a/2 from the centre, so I=Ma²/4+M(a/2)²=Ma²/2.
The perpendicular axis through O is I⊥=Ma²/2+M(a/2)²=3Ma²/4.
Therefore I⊥=I+Ma²/4.
Stream:JEESubject:PhysicsTopic:RotationSubtopic:Miscellaneous
⏱ 2mℹ️ Source: QB
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