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Saturday, 31 October

JEE Main · Physics · System of Particles and Rotational Motion

COM of Composite Bodies

JEE Main asked COM of Composite Bodies 3 times in 3 of the 108 shifts Lumi analysed, in 2020, 2021 and 2024. It belongs to Center of Mass, in System of Particles and Rotational Motion (Physics). The longest wait between two years asking it was 3 years.

Updated 2026-10-24

Times asked
3
in 3 shifts
Years
3 of 8
First asked
2020
last in 2024
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2021 and 2024. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.050.10’170.08’200.03’210’220’230.05’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 1 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 1 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
  • 20241 of 18
  • 20230 of 12
  • 20220 of 24
  • 20211 of 24
  • 20201 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Diagram based is the usual form. Skill tested: calculation.

  • Centre of mass of plate with cutout
  • Centre of mass of composite lamina

Difficulty

Easy 1Medium 2Hard 0

1 of the 3 questions had a numerical answer.

Every question

All 3 questions

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

  1. 8 Apr 2024, Shift 1 · Q52A uniform thin metal plate of mass 10 kg with dimensions is shown. The ratio of xx and yy coordinates of center of mass of plate in…MediumNumerical valueHas a figure
  2. 24 Feb 2021, Shift 2 · Q3A circular hole of radius (a2)\left(\frac{a}{2}\right) is cut out of a circular disc of radius 'a' as shown in figure. The centroid of the…MediumDiagram basedHas a figure
  3. 8 Jan 2020, Shift 1 · Q3The coordinates of centre of mass of a uniform flag shaped lamina (thin flat plate) of mass 4 kg. (The coordinates of the same are shown…EasySingle correctHas a figure

Shifts: 8 Jan 2020, Shift 1, 24 Feb 2021, Shift 2, 8 Apr 2024, Shift 1.

Same topic

Other ideas in Center of Mass

Center of Mass has 13 ideas JEE Main has asked; 5 of them came up in more than one question.

Topic analysisChapter analysisStudy this chapterAll repeated ideas