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Saturday, 31 October

JEE Main 2024 · PhysicsNumerical answerNumerical valueMediumMulti-step

JEE Main 27 January 2024, Shift 1, Physics Q51

Question 51 of 90 in this shift, Physics question 21 of 30, Section B.

A particle starts from origin at t = 0 with a velocity 5 i^5\,\hat{i} m/s and moves in xx-yy plane under action of a force which produces a constant acceleration of (3i^+2j^)(3\hat{i} + 2\hat{j}) m/s2^2. If the xx-coordinate of the particle at that instant is 84 m, then the speed of the particle at this time is α\sqrt{\alpha} m/s. The value of α\alpha is ________.

Official answer

673

NTA final key.

Chapter
Motion in a Plane
Topic
Kinematics in 2D
Idea tested
Independence of Axes

Same idea in other shifts

Asked 2× in all
  1. 9 Jan 2020, Shift 2 · Q2A particle starts from the origin at t=0t=0 with an initial velocity of 3.0 i^3.0\,\hat{i} m/s and moves in the xx-yy plane with a constant…EasySingle correct

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.