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Saturday, 31 October

JEE Main 2021 · PhysicsMultiple choiceSingle correctMediumApplication

JEE Main 18 March 2021, Shift 2, Physics Q2

Question 2 of 90 in this shift, Physics question 2 of 30, Section A.

An object of mass m1m_1 collides with another object of mass m2m_2, which is at rest. After the collision the objects move with equal speeds in opposite direction. The ratio of the masses m2:m1m_2 : m_1 is :
  1. (1)1:11:1
  2. (2)1:21:2
  3. (3)2:12:1
  4. (4)3:13:1Official answer

Official answer

Option 4

NTA final key.

Chapter
Work, Energy and Power
Topic
Collisions
Idea tested
1D Elastic Collisions

Same idea in other shifts

Asked 2× in all
  1. 26 Feb 2021, Shift 1 · Q2Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Body ‘P’ having mass…EasyAssertion–reason

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.