NEET UG · Physics · Class 11

System of Particles and Rotational Motion: NEET previous year questions

25 questions in ten years of NEET, asked in 10 of 10 years. Here is what this chapter tests and how.

Asked in 10 years: 25; 10 of 10 papers
10-year average: 2.4; a paper · 2.6 since 2024 0.3
Typical range: 2–3; questions a paper; fewest 1, most 4
Weighted estimate: 2.5; model, recent papers count more · about 10 marks

Typical range (fact)
10-year average (fact)
Weighted estimate (model)

Typical range: questions per paper in the middle eight of the ten papers, leaving out the single highest and lowest year (about the 10th to 90th percentile), each paper scaled to 180 questions. The ten-year average and the range are historical fact. The weighted estimate is a model: each paper's share, with recent papers counting more (half-life three years), and dropped syllabus removed. It is a guide to effort, not a forecast.

What to do

How to spend time on System of Particles and Rotational Motion

Priority

Must do

Among the chapters that held the first half of all NEET questions in ten years. How bands are set

Past questions: 25in 10 of 10 papers
Study plan gives it: 19 hover 12 months; 14 h over 6

Study this chapter →Practise →

Ideas asked most often

Moment of Inertia of Standard Bodies3×
Parallel and Perpendicular Axis Theorems2×
Conservation of Angular Momentum2×
Rotational Equilibrium2×
Rotational Kinematics2×

81 of the 85 ideas in Lumi’s map of this chapter have not been asked or touched in ten years. New questions often come from ideas like these, so learn the whole chapter, not just the list above.

Questions per year

Kind of question

SHARE OF 10 YEARS

Calculation76%
Concept16%
Figure-based8%

Most common asks: numerical (15); order of work to stop rotating bodies (1); quantity conserved when body shape changes (1).

Profile

This chapter in numbers

Where it ranks, how steady it is, and what it costs to study.

Rank, all NEET chapters: #29; of 80 by weighted estimate
Rank in Physics: #4; of 27 chapters
Share of the paper: 1.4%; ten-year average
Busiest year: 2018; 4 questions
Year to year: Steady; varies by about 0.8 questions
Long-run direction: -0.06; questions per paper, per year
Easy questions: 40%; 85% of ideas rated hard
With a figure: 24%; graph, diagram or structure
Study time: 19 h; 14 h on a 6-month plan
Marks per study hour: 0.53; #54 of 80 chapters
Foundation for others: 64%; of its ideas are used in other chapters

Difficulty, year by year

Each question rated easy, medium or hard against NCERT.

20173
20184
20192
20202
20212
20223
20231
20242
20253
20263

Easy
Medium
Hard

What it asks you to do

SHARE OF QUESTIONS

Calculation48%
Multi-step28%
Concept20%
Application4%

Coverage

How much of the chapter NEET has used

We split the chapter into 85 ideas. In ten years NEET built a question around 3 of them. Most of the chapter has never been asked, which is why learning it whole beats memorising past questions.

Asked as the main idea: 3
Touched on in a question: 1
Never asked: 81

Topics

What repeats, topic by topic

Questions per topic in each year's paper. Topics that come every year are worth learning first.

Rotational Motion · Every year21
2421221232
Center of Mass · Most years4
1111

’17’18’19’20’21’22’23’24’25’26

Topic	2017	’18	2019	’20	2021	’22	2023	’24	2025	’26	Total
Rotational MotionEvery year	2	4	2	1	2	2	1	2	3	2	21
Center of MassMost years	1	·	·	1	·	1	·	·	·	1	4

04+questions in that year’s paper

Rotational Motion
Expect a short numerical problem (one or two formula steps, four numeric options) about Rotational Motion. Past framings centre on: numerical; order of work to stop rotating bodies.

Drill down

Topic, idea, question

Open a topic to see every idea NEET tested inside it, then open an idea to read the questions. Each row shows its ten papers.

topicAskedShareYears’17’18’19’20’21’22’23’24’25’26

Open21 · 84%84%10/1024222232
12 ideas inside
- Repeated3 · 14%14%3/10
- Repeated2 · 10%10%2/10
- Repeated2 · 10%10%2/10
- Repeated2 · 10%10%2/10
- Repeated2 · 10%10%2/10
- Repeated2 · 10%10%2/10
- Repeated2 · 10%10%2/10
- Repeated2 · 10%10%2/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
- 1 · 5%5%1/10
Open4 · 16%16%4/10

Squares are the ten papers, 2017 to 2026; darker means more questions. Share is of the level above.

Ideas

The exact ideas NEET has asked

Inside the topics, 15 different ideas were tested. These came more than once, or are new since 2024.

Moment of Inertia of Standard Bodies3×
order of work to stop rotating bodies
Parallel and Perpendicular Axis TheoremsNew2×
difference of moments of inertia about two axes
Conservation of Angular Momentum2×
quantity conserved when body shape changes
Rotational Equilibrium2×
numerical
Rotational Kinematics2×
direction of angular acceleration
COM Distance in Two-Body Systems2×
numerical
Torque as a Cross Product2×
numerical
Kinetic Energy of Rolling Bodies2×
numerical
Torque and Angular Acceleration2×
numerical
Motion of Center of MassNew1×
graph of total momentum of two particles on circle
Angular Momentum about Different PointsNew1×
ratio of angular momentum about two points
Velocities of Points on a Rolling WheelNew1×
compare speeds of points on rolling wheel

Idea	Times	Usually asked as
Moment of Inertia of Standard Bodiesorder of work to stop rotating bodies	3	One-line MCQ
Parallel and Perpendicular Axis Theoremsdifference of moments of inertia about two axes	2	Figure-basedNew
Conservation of Angular Momentumquantity conserved when body shape changes	2	Numerical
Rotational Equilibriumnumerical	2	Numerical
Rotational Kinematicsdirection of angular acceleration	2	Numerical
COM Distance in Two-Body Systemsnumerical	2	Numerical
Torque as a Cross Productnumerical	2	Numerical
Kinetic Energy of Rolling Bodiesnumerical	2	Numerical
Torque and Angular Accelerationnumerical	2	Numerical
Motion of Center of Massgraph of total momentum of two particles on circle	1	Figure-basedNew
Angular Momentum about Different Pointsratio of angular momentum about two points	1	NumericalNew
Velocities of Points on a Rolling Wheelcompare speeds of points on rolling wheel	1	One-line MCQNew

Every question

System of Particles and Rotational Motion questions, year by year

The opening words of each question as it appeared in the official paper.

NEET 20263 questions

Q23A frictionless circular wire of unit radius is fixed on the horizontal plane. Two point particles of unit mass start moving simultaneously…Figure-based · figure
Q27A solid sphere A of radius R and mass M is attached at a point to a smaller solid sphere B of radius $r<R$ and mass $m<M$ . Assume that the…Numerical · figure
Q31A thin horizontal disc is rotating about a vertical axis passing through its fixed centre O. Its angular momentum is $L_A$ and $L_B$ …Numerical · figure

NEET 20253 questions

Q17The Sun rotates around its centre once in 27 days. What will be the period of revolution if the Sun were to expand to twice its present…Numerical
Q22A uniform rod of mass 20 kg and length 5 m leans against a smooth vertical wall making an angle of 60° with it. The other end rests on a…Numerical
Q39A sphere of radius $R$ is cut from a larger solid sphere of radius $2R$ as shown in the figure. The ratio of the moment of inertia of the…Figure-based · figure

NEET 20242 questions

Q1A wheel of a bullock cart is rolling on a level road as shown in the figure below. If its linear speed is $v$ in the direction shown,…One-line MCQ · figure
Q27The moment of inertia of a thin rod about an axis passing through its mid point and perpendicular to the rod is 2400 g cm $^2$ . The length…Numerical

NEET 20231 question

Q15The angular acceleration of a body, moving along the circumference of a circle, is :One-line MCQ

NEET 20223 questions

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…Numerical
Q12The angular speed of a fly wheel moving with uniform angular acceleration changes from 1200 rpm to 3120 rpm in 16 seconds. The angular…Numerical
Q16The ratio of the radius of gyration of a thin uniform disc about an axis passing through its centre and normal to its plane to the radius…One-line MCQ

NEET 20212 questions

Q36From a circular ring of mass 'M' and radius 'R' an arc corresponding to a 90° sector is removed. The moment of inertia of the remaining…One-line MCQ
Q43A uniform rod of length 200 cm and mass 500 g is balanced on a wedge placed at 40 cm mark. A mass of 2 kg is suspended from the rod at 20…Numerical · figure

NEET 20202 questions

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…Numerical
Q149Find the torque about the origin when a force of $3\hat{j}$ N acts on a particle whose position vector is $2\hat{k}$ m.Numerical

NEET 20192 questions

Q9A disc of radius 2 m and mass 100 kg rolls on a horizontal floor. Its centre of mass has speed of 20 cm/s. How much work is needed to stop…Numerical
Q21A solid cylinder of mass 2 kg and radius 4 cm is rotating about its axis at the rate of 3 rpm. The torque required to stop after 2π…Numerical

NEET 20184 questions

Q31Three objects, A : (a solid sphere), B : (a thin circular disk) and C : (a circular ring), each have the same mass M and radius R. They…One-line MCQ
Q36The moment of the force, $\vec{F} = 4\hat{i} + 5\hat{j} - 6\hat{k}$ at (2, 0, – 3), about the point (2, – 2, – 2), is given byNumerical
Q38A solid sphere is rotating freely about its symmetry axis in free space. The radius of the sphere is increased keeping its mass same.…One-line MCQ
Q41A solid sphere is in rolling motion. In rolling motion a body possesses translational kinetic energy ( $K_t$ ) as well as rotational kinetic…Numerical

NEET 20173 questions

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)…Other
Q39Two discs of same moment of inertia rotating about their regular axis passing through centre and perpendicular to the plane of disc with…One-line MCQ
Q41A rope is wound around a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is…Numerical

Questions from the official NEET UG papers published by NTA (CBSE before 2019). Topic and idea tags, counts and notes are Lumi’s.

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