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Saturday, 31 October

JEE Main 2024 · PhysicsNumerical answerNumerical valueHardMulti-step

JEE Main 31 January 2024, Shift 1, Physics Q51

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

A body starts falling freely from height HH hits an inclined plane in its path at height hh. As a result of this perfectly elastic impact, the direction of the velocity of the body becomes horizontal. The value of Hh\frac{H}{h} for which the body will take the maximum time to reach the ground is ________.

Official answer

2

NTA final key.

Same topic in other shifts

All Kinematics in 2D questions
  1. 4 Apr 2024, Shift 1 · Q32The co-ordinates of a particle moving in xx-yy plane are given by : x=2+4t, y=3t+8t2x = 2 + 4t,\ y = 3t + 8t^2. The motion of the particle is :EasySingle correct
  2. 8 Apr 2024, Shift 1 · Q51Three vectors OP→\overrightarrow{OP}, OQ→\overrightarrow{OQ} and OR→\overrightarrow{OR} each of magnitude AA are acting as shown in figure.…EasyNumerical valueHas a figure
  3. 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
  4. 27 Jan 2024, Shift 1 · Q51A 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…MediumNumerical value
  5. 30 Jan 2024, Shift 2 · Q51A vector has magnitude same as that of A⃗=3i^+4j^\vec{A} = 3\hat{i} + 4\hat{j} and is parallel to B⃗=4i^+3j^\vec{B} = 4\hat{i} + 3\hat{j}. The xx and yy…EasyNumerical value
  6. 6 Apr 2023, Shift 1 · Q39A particle is moving with constant speed in a circular path. When the particle turns by an angle 90∘90^\circ, the ratio of instantaneous…MediumSingle 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.