JEE Main 2022 · PhysicsMultiple choiceSingle correctMediumMulti-step

JEE Main 29 July 2022, Shift 1, Physics Q32

Question 32 of 90 in this shift, Physics question 2 of 30, Section A.

A ball is thrown up vertically with a certain velocity so that, it reaches a maximum height h. Find the ratio of the times in which it is at height

\frac{h}{3}

while going up and coming down respectively.

(1) $\frac{\sqrt{2}-1}{\sqrt{2}+1}$
(2) $\frac{\sqrt{3}-\sqrt{2}}{\sqrt{3}+\sqrt{2}}$ Official answer
(3) $\frac{\sqrt{3}-1}{\sqrt{3}+1}$
(4) $\frac{1}{3}$

Official answer

Option 2

NTA final key.

Chapter: Motion in a Straight Line
Topic: Kinematics in 1D
Idea tested: Kinematic Symmetry in Free Fall

Same topic in other shifts

All Kinematics in 1D questions

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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.