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Friday, 9 October

NEET UG 2021 · Physics · Question 42

NEET 2021 Physics, question 42

Question 42 of the NEET 2021 paper (code O1) is a Physics question from Gravitation. Its idea, Escape Velocity, was asked 3 times, in 2021 and 2026, across NEET 2017–2026. The NTA final answer key gives option 2.

Updated 2026-10-08

Q42 · Physics

A particle of mass 'm' is projected with a velocity v=kVev = kV_e (k < 1) from the surface of the earth.

(VeV_e = escape velocity)

The maximum height above the surface reached by the particle is :

  1. 1R2k1+k\frac{R^{2}k}{1+k}
  2. 2Rk21−k2\frac{Rk^{2}}{1-k^{2}}Official answer
  3. 3R(k1−k)2R\left(\frac{k}{1-k}\right)^{2}
  4. 4R(k1+k)2R\left(\frac{k}{1+k}\right)^{2}

Official answer: option 2 · NTA final answer key

Same idea

Escape Velocity, in other papers

NEET asked this idea 3 times, in 2021 and 2026. The other 2 questions below.

  • 2026 Q13Two planets P1P_1 and P2P_2 with equal mass have radii R1R_1 and R2R_2, respectively, where R2=R12R_2=\frac{R_1}{2}. The escape speeds of…Numerical · Easy
  • 2021 Q7The escape velocity from the Earth's surface is vv. The escape velocity from the surface of another planet having a radius, four times…One-line MCQ · Medium

Escape Velocity: every question and how it was framed

The chapter

Gravitation in ten years of NEET

19 questions from 2017–2026, asked in 10 of 10 papers, about 1.8 a paper. Gravitation alone had 19.

Chapter analysisStudy this chapterPractise this chapter

Gravitation: questions per paper

0242’172’182’191’202’212’222’232’242’252’26