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Saturday, 31 October

JEE Main · Physics · Work, Energy and Power

1D Elastic Collisions

JEE Main asked 1D Elastic Collisions 2 times in 2 of the 108 shifts Lumi analysed, all in 2021. It belongs to Collisions, in Work, Energy and Power (Physics). In 2021 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
2
in 2 shifts
Years
1 of 8
First asked
2021
the only year
Pattern
Gone quiet
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.050.10’170’200.07’210’220’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 2 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 0 in 8 shifts · 2026: 0 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20260 of 9
  • 20250 of 8
  • 20240 of 18
  • 20230 of 12
  • 20220 of 24
  • 20212 of 24
  • 20200 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Assertion–reason is the usual form. Skill tested: application.

  • Mass ratio from outcome of collision
  • Assertion-reason on elastic collision

Difficulty

Easy 1Medium 1Hard 0

Every question was multiple choice.

Every question

All 2 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 18 Mar 2021, Shift 2 · Q2An object of mass m1m_1 collides with another object of mass m2m_2, which is at rest. After the collision the objects move with equal…MediumSingle correct
  2. 26 Feb 2021, Shift 1 · Q2Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Body ‘P’ having mass…EasyAssertion–reason

Shifts: 26 Feb 2021, Shift 1, 18 Mar 2021, Shift 2.

Same topic

Other ideas in Collisions

Collisions has 17 ideas JEE Main has asked; 10 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas