NEET UG · Physics · System of Particles and Rotational Motion
Center of Mass: NEET previous year questions
4 questions in ten years of NEET, in 4 of 10 papers. Pattern: Most years. Here is how it is asked and which ideas come back.
- Asked in 10 years
- 4
- about 0.4 per paper
- Years asked
- 4/10
- last asked 2026
- Weighted estimate
- 0.4
- model; history: 0.4 a paper on average, typically 0–1
Key findings
- 01
Asked in 4 of 10 papers, 4 questions in all: #166 of 204 topics by ten-year total. It comes back every 3.0 years on average.
- 02
67% of its questions since 2018 tested an idea never asked before; none repeated an idea from the year before.
- 03
The most repeated idea is COM Distance in Two-Body Systems, asked 2 times (2020, 2022), usually as “numerical”.
- 04
NEET has asked 3 of the 85 ideas in this topic; 81 have never been asked, directly or indirectly.
- 05
Mostly asked as numerical (50%); 50% easy, 25% hard.
Questions per year
- Up to 2023
- 0.4
- per paper
- Since 2024
- 0.3
- -0.1
- Usual gap
- 3.0 yrs
- between papers asking it
- Swing
- ±0.5
- questions, year to year
How it is asked
Difficulty, format and skill
Across all 4 questions on Center of Mass since 2017.
Difficulty
QUESTIONS- Easy2 · 50%
- Medium1 · 25%
- Hard1 · 25%
Format
SHARE- Numerical · 2 Q50%
- Figure-based · 1 Q25%
- Other · 1 Q25%
Skill tested
SHARE- Calculation · 2 Q50%
- Multi-step · 1 Q25%
- Concept · 1 Q25%
Repeats
New idea, or one asked before?
Each column is a paper. Blue questions tested an idea NEET had not asked before; navy ones went back to an idea from an earlier paper. 2017 is the first paper, so everything in it counts as new.
- Idea asked for the first time
- Idea asked in an earlier paper
Coverage of the topic
NEET has asked 3 of the 85 ideas in this topic. 81 have never been asked yet.
- Asked directly3 · 4%
- Touched inside another question1 · 1%
- Never asked81 · 95%
Ideas come from Lumi’s syllabus map of NCERT. A never-asked idea is not a safe skip: most new questions come from exactly these.
Drill down
Idea, year, question
Every idea NEET tested in this topic, with its ten papers. Open one to read the questions.
- Repeated2 · 50%
- 2022 · Q9Two objects of mass 10 kg and 20 kg respectively are connected to the two ends of a rigid rod of length 10 m with negligible mass. The…
easyNumerical
- 2020 · Q148Two particles of mass 5 kg and 10 kg respectively are attached to the two ends of a rigid rod of length 1 m with negligible mass. The…
easyNumericalNew idea
- 2022 · Q9
- 1 · 25%
- 1 · 25%
Squares are the ten papers, 2017 to 2026; darker means more questions. Share is of the level above.
Ideas
Every idea inside this topic
3 different ideas were tested; 1 came more than once. Motion of Center of Mass is the foundation for 30 other ideas in the syllabus.
- COM Distance in Two-Body Systems2×
numerical
Numerical · 6% next · foundation for 2 - Motion of Center of Mass1×
graph of total momentum of two particles on circle
Figure-based · 6% next · foundation for 30 - Center of Gravity vs Center of Mass1×
count correct statements on centre of mass and rotation
Other · 4% next
Chance next is the historical rate at which an idea with this record came back in the following paper. It is low for every idea, which is why learning the topic beats memorising past questions. All repeated ideas
Every question
Center of Mass questions, year by year
The opening words of each question as it appeared in the official paper, with the idea it tested.
NEET 20261 question
- Q23A frictionless circular wire of unit radius is fixed on the horizontal plane. Two point particles of unit mass start moving simultaneously…
Idea: Motion of Center of Mass
New ideaHardFigure-based · figure
NEET 20221 question
- Q9Two objects of mass 10 kg and 20 kg respectively are connected to the two ends of a rigid rod of length 10 m with negligible mass. The…
Idea: COM Distance in Two-Body Systems
EasyNumerical
NEET 20201 question
- Q148Two particles of mass 5 kg and 10 kg respectively are attached to the two ends of a rigid rod of length 1 m with negligible mass. The…
Idea: COM Distance in Two-Body Systems
New ideaEasyNumerical
NEET 20171 question
- Q26Which of the following statements are correct ? (a) Centre of mass of a body always coincides with the centre of gravity of the body. (b)…
Idea: Center of Gravity vs Center of Mass
MediumOther
Questions from the official NEET UG papers published by NTA (CBSE before 2019). Topic and idea tags, counts and notes are Lumi’s.