JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 30 July 2022, Shift 2, Physics Q3

Question 3 of 90 in this shift, Physics question 3 of 30, Section A.

A bullet of mass 10 gram is fired with velocity of 100 m/s from the gun of mass 1 kg . Recoil speed of the gun is :

(1) $1\ \mathrm{m/s}$ Official answer
(2) $10\ \mathrm{m/s}$
(3) $0.5\ \mathrm{m/s}$
(4) $0.1\ \mathrm{m/s}$

Official answer

Option 1

NTA final key.

Chapter: System of Particles and Rotational Motion
Topic: Center of Mass
Idea tested: COM Velocity Conservation

Same idea in other shifts

Asked 4× in all

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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.