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Friday, 9 October

NEET UG 2020 · Physics · Question 149

NEET 2020 Physics, question 149

Question 149 of the NEET 2020 paper (code E1) is a Physics question from System of Particles and Rotational Motion. Its idea, Torque as a Cross Product, was asked twice, in 2018 and 2020, across NEET 2017–2026. The NTA final answer key gives option 3.

Updated 2026-10-08

Q149 · Physics

Find the torque about the origin when a force of 3j^3\hat{j} N acts on a particle whose position vector is 2k^2\hat{k} m.

  1. 16i^6\hat{i} N m
  2. 26j^6\hat{j} N m
  3. 3−6i^-6\hat{i} N mOfficial answer
  4. 46k^6\hat{k} N m

Official answer: option 3 · NTA final answer key

Same idea

Torque as a Cross Product, in other papers

NEET asked this idea twice, in 2018 and 2020. The other question below.

  • 2018 Q36The moment of the force, F⃗=4i^+5j^−6k^\vec{F} = 4\hat{i} + 5\hat{j} - 6\hat{k} at (2, 0, – 3), about the point (2, – 2, – 2), is given byNumerical · Easy

Torque as a Cross Product: 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

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