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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 24 June 2022, Shift 1, Physics Q39

Question 39 of 90 in this shift, Physics question 9 of 30, Section A.

A particle experiences a variable force F⃗=(4xi^+3y2j^)\vec{F}=(4x\hat{i}+3y^2\hat{j}) in a horizontal xx-yy plane. Assume distance in meters and force is newton. If the particle moves from point (1,2)(1, 2) to point (2,3)(2, 3) in the xx-yy plane, then Kinetic Energy changes by :
  1. (1)50.0 J
  2. (2)12.5 J
  3. (3)25.0 JOfficial answer
  4. (4)0 J

Official answer

Option 3

NTA final key (2022 Session 1).

Chapter
Work, Energy and Power
Topic
Work and Kinetic Energy
Idea tested
Work via Line Integrals

Same idea in other shifts

Asked 2× in all
  1. 9 Jan 2020, Shift 1 · Q2Consider a force F⃗=−xi^+yj^\vec{F} = -x\hat{i} + y\hat{j}. The work done by this force in moving a particle from point A(1, 0) to B(0, 1) along…EasySingle correctHas a figure

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.