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Friday, 9 October

NEET UG 2019 · Physics · Question 21

NEET 2019 Physics, question 21

Question 21 of the NEET 2019 paper (code P1) is a Physics question from System of Particles and Rotational Motion. Its idea, Torque and Angular Acceleration, was asked twice, in 2017 and 2019, across NEET 2017–2026. The NTA final answer key gives option 1.

Updated 2026-10-08

Q21 · Physics

A solid cylinder of mass 2 kg and radius 4 cm is rotating about its axis at the rate of 3 rpm. The torque required to stop after 2π revolutions is :

  1. 12×10−62\times10^{-6} N mOfficial answer
  2. 22×10−32\times10^{-3} N m
  3. 312×10−412\times10^{-4} N m
  4. 42×1062\times10^{6} N m

Official answer: option 1 · NTA final answer key

Same idea

Torque and Angular Acceleration, in other papers

NEET asked this idea twice, in 2017 and 2019. The other question below.

  • 2017 Q41A rope is wound around a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is…Numerical · Easy

Torque and Angular Acceleration: 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.

Chapter analysisStudy this chapterPractise this chapter

System of Particles and Rotational Motion: questions per paper

0243’174’182’192’202’213’221’232’243’253’26