Q84 / 270 · NDA 2019 (Phase 2) · General Ability

A solid disc and a solid sphere have the same mass and same radius. Which one has the higher moment of inertia about its centre of mass?

Correct answer
A
The disc
B
The sphere
C
Both have the same moment of inertia
D
The information provided is not sufficient to answer the question

Solution

Moment of inertia of a solid sphere is less than that of solid disc with same mass and diameter.

Hence, the correct answer is option: 'A'.

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