JEE Main 2022 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 28 June 2022, Shift 1, Physics Q56

Question 56 of 90 in this shift, Physics question 26 of 30, Section B.

A man of 60 kg is running on the road and suddenly jumps into a stationary trolley car of mass 120 kg. Then, the trolley car starts moving with velocity 2

\mathrm{ms^{-1}}

. The velocity of the running man was ____________

\mathrm{ms^{-1}}

, when he jumps into the car.

Official answer

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

30 Jul 2022, Shift 2 · Q3A 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 :EasySingle correct
31 Aug 2021, Shift 1 · Q24A block moving horizontally on a smooth surface with a speed of 40 ms $^{-1}$ splits into two equal parts. If one of the parts moves at 60…EasyNumerical value
25 Jul 2021, Shift 1 · Q21A body of mass 2 kg moving with a speed of 4 m/s. makes an elastic collision with another body at rest and continues to move in the…MediumNumerical value

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.