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Physics - Rotation Question with Solution | TestHub

PhysicsRotationCalculation of M.I.Medium2 minQB

PhysicsMediumsingle choice

$I_{1}$ and $I_{2}$ are diametric axis and $I_{3}$ is axis perpendicular to plane of disc and passing through centre of disc having mass m and radius $R, I_{1} + I_{2} + I_{3}$ will be :

Disc with perpendicular centre axis I3 and two perpendicular diametric axes I1 and I2

Options:

Answer:

Solution:

For a uniform disc about the axis perpendicular to its plane,

$I_{3} = \frac{m R ^{2}}{2}$

The perpendicular-axis theorem gives

$I_{1} + I_{2} = I_{3}$

$I_{1} + I_{2} + I_{3} = 2 I_{3} = m R^{2}$

Option A.

Stream:JEESubject:PhysicsTopic:RotationSubtopic:Calculation of M.I.

⏱ 2mℹ️ Source: QB

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