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Physics - Rotation Question with Solution | TestHub

PhysicsRotationMiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

The diameter of a flywheel is increased by $1 %$ . Increase in its moment of inertia about the central axis is

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Answer:

Solution:

$I = M R^{2} ∴ \log I = \log M + 2 \log R$

Differentiating, we get $\frac{d I}{I} = 0 + 2 \frac{d R}{R}$

$∴ \frac{d I}{I} \times 100 = 2 (\frac{d R}{R}) \times 100$

$= 2 \times \frac{1}{100} \times 100 = 2 %$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:RotationSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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