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Saturday, 31 October

JEE Main · Physics · Work, Energy and Power

Conservation of Mechanical Energy

JEE Main asked Conservation of Mechanical Energy 7 times in 7 of the 108 shifts Lumi analysed, in 2021, 2022, 2024 and 2025. It belongs to Work and Kinetic Energy, in Work, Energy and Power (Physics). The longest wait between two years asking it was 2 years. In 2021 and 2022 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
7
in 7 shifts
Years
4 of 8
First asked
2021
last in 2025
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021, 2022, 2024 and 2025. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.10.20’170’200.10’210.07’220’230.05’240.13’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 3 in 24 shifts · 2022: 2 in 24 shifts · 2023: 0 in 12 shifts · 2024: 1 in 18 shifts · 2025: 1 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
  • 20251 of 8
  • 20241 of 18
  • 20230 of 12
  • 20222 of 24
  • 20213 of 24
  • 20200 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Numerical value is the usual form. Skill tested: calculation.

  • Height and speed when ke is multiple of pe
  • Speed from energy conservation on track

Difficulty

Easy 4Medium 2Hard 1

4 of the 7 questions had a numerical answer.

Every question

All 7 questions

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

  1. 3 Apr 2025, Shift 1 · Q28A particle is released from height S above the surface of the earth. At certain height its kinetic energy is three times its potential…EasySingle correct
  2. 30 Jan 2024, Shift 1 · Q35A particle is placed at the point A of a frictionless track ABC as shown in figure. It is gently pushed towards right. The speed of the…EasyDiagram basedHas a figure
  3. 28 Jun 2022, Shift 1 · Q51A pendulum is suspended by a string of length 250 cm. The mass of the bob of the pendulum is 200 g. The bob is pulled aside until the…EasyNumerical valueHas a figure
  4. 27 Jun 2022, Shift 2 · Q52A rolling wheel of 12 kg is on an inclined plane at position P and connected to a mass of 3 kg through a string of fixed length and pulley…HardNumerical valueHas a figure
  5. 18 Mar 2021, Shift 1 · Q24As shown in the figure, a particle of mass 10 kg is placed at a point A. When the particle is slightly displaced to its right, it starts…EasyNumerical valueHas a figure
  6. 26 Feb 2021, Shift 2 · Q8A cord is wound round the circumference of wheel of radius r. The axis of the wheel is horizontal and the moment of inertia about it is I.…MediumSingle correct
  7. 26 Aug 2021, Shift 1 · Q21A uniform chain of length 3 meter and mass 3 kg overhangs a smooth table with 2 meter laying on the table. If k is the kinetic energy of…MediumNumerical value

Shifts: 26 Feb 2021, Shift 2, 18 Mar 2021, Shift 1, 26 Aug 2021, Shift 1, 27 Jun 2022, Shift 2, 28 Jun 2022, Shift 1, 30 Jan 2024, Shift 1, 3 Apr 2025, Shift 1.

Same topic

Other ideas in Work and Kinetic Energy

Work and Kinetic Energy has 21 ideas JEE Main has asked; 14 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas