Centre of Mass & Linear Momentum JEE Main PYQs, 2020 to 2025

Centre of Mass & Linear Momentum has 32 questions in JEE Main papers from 2020 to 2025, about 5.3 per year across all shifts. The most asked topic is Conservation of Linear Momentum (11 questions), followed by Centre of Mass (10) and Impulse-Momentum Theorem (9).

Updated 26 Sep 2026

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32Total PYQs

6Years covered

4Topics

2025 Jan S1Latest paper

Centre of Mass & Linear Momentum questions per year

Year	Questions
2025	2
2024	10
2023	4
2022	9
2021	4
2020	3

Topic-wise weightage

Topic	Questions	Share of chapter	Last asked
Conservation of Linear Momentum	11	35%	2024
Centre of Mass	10	31%	2025
Impulse-Momentum Theorem	9	28%	2024
Rocket Propulsion	2	6%	2022

Sample questions from recent papers

JEE Main 2025 · 23 Jan · Shift 1 · Centre of Mass

Consider a circular disc of radius 20 cm with centre located at the origin. A circular hole of radius 5 cm is cut from this disc in such a way that the edge of the hole touches the edge of the disc. The distance of centre of mass of residual or remaining disc from the origin will be

(A)1.5 cm
(B)2.0 cm
(C)0.5 cm
(D)1.0 cm

Answer: (D)

Step-by-step solution

JEE Main 2024 · 9 Apr · Shift 2 · Conservation of Linear Momentum

A nucleus at rest disintegrates into two smaller nuclei with their masses in the ratio of $2: 1$ . After disintegration they will move :

(A)in opposite directions with speed in the ratio of $1: 2$ respectively.
(B)in the same direction with same speed.
(C)in opposite directions with speed in the ratio of $2: 1$ respectively.
(D)in opposite directions with the same speed.

Answer: (A)

Step-by-step solution

JEE Main 2024 · 1 Feb · Shift 2 · Impulse-Momentum Theorem

A cricket player catches a ball of mass

120 \mathrm{~g}

moving with

25 \mathrm{~m} / \mathrm{s}

speed. If the catching process is completed in

0.1 \mathrm{~s}

then the magnitude of force exerted by the ball on the hand of player will be (in SI unit) :

(A)30
(B)24
(C)12
(D)25

Answer: (A)

Step-by-step solution

JEE Main 2022 · 28 Jul · Shift 1 · Rocket Propulsion

A balloon has mass of $10 \mathrm{~g}$ in air. The air escapes from the balloon at a uniform rate with velocity $4.5 \mathrm{~cm} / \mathrm{s}$ . If the balloon shrinks in $5 \mathrm{~s}$ completely. Then, the average force acting on that balloon will be (in dyne).

(A)3
(B)9
(C)12
(D)18

Answer: (B)

Step-by-step solution

All 32 questions are in the free PDF above, grouped by topic.

Frequently asked

How many questions come from Centre of Mass & Linear Momentum in JEE Main?

32 questions from 2020 to 2025, about 5.3 per year. In 2025 it had 2.

Which Centre of Mass & Linear Momentum topics are most important for JEE Main?

By past papers: Conservation of Linear Momentum (35%), Centre of Mass (31%) and Impulse-Momentum Theorem (28%) of all Centre of Mass & Linear Momentum questions.

Is the Centre of Mass & Linear Momentum PYQ PDF free?

Yes. The PDF, the answer key and every step-by-step solution on PrepWiser are free, with no login needed to practise.

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JEE Main PYQs by year: 2025 · 2024 · 2023 · 2022 · 2021 · 2020

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