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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceDiagram basedMediumMulti-step

JEE Main 28 June 2022, Shift 2, Physics Q34

Question 34 of 90 in this shift, Physics question 4 of 30, Section A.

A 34\sqrt{34} m long ladder weighing 10 kg leans on a frictionless wall. Its feet rest on the floor 3 m away from the wall as shown in the figure. If Ff_f and Fw_w are the reaction forces of the floor and the wall, then ratio of Fw_w/Ff_f will be : (Use g=10 m/s2^2.)

The figure, in words

A right triangle: a vertical line on the right (the wall), a horizontal base on the floor marked with a double-headed arrow labelled 3 m, and a slanted line (the ladder) from the base's left end up to the top of the vertical line, labelled with an arrow as sqrt(34) m.
  1. (1)6110\frac{6}{\sqrt{110}}
  2. (2)3113\frac{3}{\sqrt{113}}
  3. (3)3109\frac{3}{\sqrt{109}}Official answer
  4. (4)2109\frac{2}{\sqrt{109}}

Official answer

Option 3

NTA final key.

Chapter
System of Particles and Rotational Motion
Topic
Torque and Equilibrium
Idea tested
Ladder Equilibrium Problems

Same topic in other shifts

All Torque and Equilibrium 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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.