NEET UG 2018 · Physics · Question 31
NEET 2018 Physics, question 31
Question 31 of the NEET 2018 paper (code AA) is a Physics question from System of Particles and Rotational Motion. Its idea, Moment of Inertia of Standard Bodies, was asked 3 times, in 2018, 2021 and 2024, across NEET 2017–2026. The CBSE official answer key gives option 3.
Updated 2026-10-08
Q31 · Physics
Three objects, A : (a solid sphere), B : (a thin circular disk) and C : (a circular ring), each have the same mass M and radius R. They all spin with the same angular speed about their own symmetry axes. The amounts of work (W) required to bring them to rest, would satisfy the relation
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Official answer: option 3 · CBSE official answer key
Same idea
Moment of Inertia of Standard Bodies, in other papers
NEET asked this idea 3 times, in 2018, 2021 and 2024. The other 2 questions below.
- 2024 Q27The moment of inertia of a thin rod about an axis passing through its mid point and perpendicular to the rod is 2400 g cm. The length…Numerical · Easy
- 2021 Q36From a circular ring of mass 'M' and radius 'R' an arc corresponding to a 90° sector is removed. The moment of inertia of the remaining…One-line MCQ · Medium
Moment of Inertia of Standard Bodies: every question and how it was framed
The chapter
System of Particles and Rotational Motion in ten years of NEET
25 questions from 2017–2026, asked in 10 of 10 papers, about 2.4 a paper. Rotational Motion alone had 21.