Learn

Saturday, 31 October

JEE Main 2021 · PhysicsMultiple choiceSingle correctMediumApplication

JEE Main 16 March 2021, Shift 2, Physics Q16

Question 16 of 90 in this shift, Physics question 16 of 30, Section A.

A mosquito is moving with a velocity v⃗=0.5 t2i^+3tj^+9k^\vec{v}=0.5\,t^2\hat{i}+3t\hat{j}+9\hat{k} m/s and accelerating in uniform conditions. What will be the direction of mosquito after 2 s ?
  1. (1)tan⁡−1(52)\tan^{-1}\left(\frac{5}{2}\right) from xx-axis
  2. (2)tan⁡−1(52)\tan^{-1}\left(\frac{5}{2}\right) from yy-axis
  3. (3)tan⁡−1(23)\tan^{-1}\left(\frac{2}{3}\right) from xx-axis
  4. (4)tan⁡−1(23)\tan^{-1}\left(\frac{2}{3}\right) from yy-axisOfficial answer

Official answer

Option 4

NTA final key.

Same idea in other shifts

Asked 2× in all
  1. 27 Jan 2024, Shift 1 · Q32Position of an ant (S in metres) moving in Y-Z plane is given by S=2t2j^+5k^S = 2t^2\hat{j} + 5\hat{k} (where t is in second). The magnitude and…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.