Collision JEE Main PYQs PDF, 2020–2026

Collision questions per year

Topic-wise weightage by year

How many Collision questions each topic had in every JEE Main year (all shifts), counting every question asked, including ones not in the PDF. Darker cells mean more questions.

Swipe the table sideways for older years.

Newest questions (2026)

All 2 JEE Main 2026 Collision questions in the free PDF, latest shift first.

1. JEE Main 2026 · 23 Jan · Shift 1 · Inelastic Collision

   In a perfectly inelastic collision, two spheres made of the same material with masses 15 kg and 25 kg , moving in opposite directions with speeds of $10{\ \mathrm{m}}/{\mathrm{s}}$ and $30{\ \mathrm{m}}/{\mathrm{s}}$, respectively, strike each other and stick together. The rise in temperature (in ${}^{{\circ}}{\mathrm{C}}$ ), if all the heat produced during the collision is retained by these spheres, is :

   (specific heat of sphere material $31{\mathrm{cal}}/{\mathrm{kg}}.{}^{{\circ}}{\mathrm{C}}$ and $1{\mathrm{cal}}=4.2{\ \mathrm{J}}$ )

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2. JEE Main 2026 · 23 Jan · Shift 1 · Elastic Collision

   A small bob $A$ of mass $m$ is attached to a massless rigid rod of length 1 m pivoted at point $P$ and kept at an angle of ${60}^{{\circ}}$ with vertical as shown in figure. At distance of 1 m below point $P$, an identical bob $B$ is kept at rest on a smooth horizontal surface that extends to a circular track of radius $R$ as shown in figure. If bob $B$ just manages to complete the circular path of radius $R$ upto a point $Q$ after being hit elastically by $\mathrm{bob}A$, then radius $R$ is $\_\_\_\_$ m.

   

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Sample questions from recent papers

JEE Main 2025 · 3 Apr · Shift 2 · Inelastic Collision

Consider two blocks A and B of masses $m_1=10 \mathrm{~kg}$ and $\mathrm{m}_2=5 \mathrm{~kg}$ that are placed on a frictionless table. The block A moves with a constant speed $v=3 \mathrm{~m} / \mathrm{s}$ towards the block B kept at rest. A spring with spring constant $\mathrm{k}=3000 \mathrm{~N} / \mathrm{m}$ is attached with the block B as shown in the figure. After the collision, suppose that the blocks A and B, along with the spring in constant compression state, move together, then the compression in the spring is, (Neglect the mass of the spring)

1. (A)0 .3 m
2. (B)0.1 m
3. (C)0.4 m
4. (D)0.2 m

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Answer: (B)

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JEE Main 2025 · 29 Jan · Shift 2 · Elastic Collision

Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): Three identical spheres of same mass undergo one dimensional motion as shown in figure with initial velocities $v_{\mathrm{A}}=5 \mathrm{~m} / \mathrm{s}, v_{\mathrm{B}}=2 \mathrm{~m} / \mathrm{s}, v_{\mathrm{C}}=4 \mathrm{~m} / \mathrm{s}$. If we wait sufficiently long for elastic collision to happen, then $v_{\mathrm{A}}=4 \mathrm{~m} / \mathrm{s}, v_{\mathrm{B}}=2 \mathrm{~m} / \mathrm{s}$, $v_{\mathrm{C}}=5 \mathrm{~m} / \mathrm{s}$ will be the final velocities.

Reason (R): In an elastic collision between identical masses, two objects exchange their velocities.

In the light of the above statements, choose the correct answer from the options given below:

1. (A)

   Both (A) and (R) are true but (R) is NOT the correct explanation of (A)

2. (B)

   Both (A) and (R) are true and (R) is the correct explanation of (A)

3. (C)

   (A) is false but (R) is true

4. (D)

   (A) is true but (R) is false

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Answer: (C)

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JEE Main 2023 · 6 Apr · Shift 2 · Coefficient of Restitution

A body is dropped on ground from a height '$h_{1}$' and after hitting the ground, it rebounds to a height '$h_{2}$'. If the ratio of velocities of the body just before and after hitting ground is 4 , then percentage loss in kinetic energy of the body is $\frac{x}{4}$. The value of $x$ is ____________.

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Answer: 375

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JEE Main 2021 · 31 Aug · Shift 1 · Oblique Collision

A body of mass M moving at speed V₀ collides elastically with a mass 'm' at rest. After the collision, the two masses move at angles $\theta$₁ and $\theta$₂ with respect to the initial direction of motion of the body of mass M. The largest possible value of the ratio M/m, for which the angles $\theta$₁ and $\theta$₂ will be equal, is :

1. (A)4
2. (B)1
3. (C)3
4. (D)2

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Answer: (C)

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The free PDF above has all 40 questions grouped by topic, with an answer key.

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