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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceDiagram basedMediumCalculation

JEE Main 29 June 2022, Shift 2, Physics Q45

Question 45 of 90 in this shift, Physics question 15 of 30, Section A.

A block of mass 40 kg slides over a surface, when a mass of 4 kg is suspended through an inextensible massless string passing over frictionless pulley as shown below. The coefficient of kinetic friction between the surface and block is 0.02. The acceleration of block is. (Given g = 10 ms−2\mathrm{ms^{-2}}.)

The figure, in words

A block labelled 40 kg rests on a horizontal hatched surface; a dashed horizontal line from the block runs to a pulley at the right-hand end of the surface; a dashed vertical line from the pulley hangs a small square labelled 4 kg.
  1. (1)1 ms−2\mathrm{ms^{-2}}
  2. (2)1/5 ms−2\mathrm{ms^{-2}}
  3. (3)4/5 ms−2\mathrm{ms^{-2}}
  4. (4)8/11 ms−2\mathrm{ms^{-2}}Official answer

Official answer

Option 4

NTA final key.

Chapter
Laws of Motion
Topic
Friction
Idea tested
Rough Table Pulley System

Same topic in other shifts

All Friction questions
  1. 2 Apr 2026, Shift 2 · Q27A 0.5 kg mass is in contact against the inner wall of a cylindrical drum of radius 4 m rotating about its vertical axis. The minimum…EasySingle correct
  2. 4 Apr 2026, Shift 1 · Q28The time taken by a block of mass mm to slide down from the highest point to the lowest point on a rough inclined plane is 50 %50\ \% more…MediumSingle correct
  3. 6 Apr 2026, Shift 2 · Q46A block takes tt time to slide down a plane inclined at 45∘45^\circ to the horizontal. If the surface is made smooth (frictionless), the…MediumNumerical value
  4. 4 Apr 2025, Shift 2 · Q44A block of mass 25 kg is pulled along a horizontal surface by a force at an angle 45∘45^\circ with the horizontal. The friction coefficient…MediumSingle correct
  5. 7 Apr 2025, Shift 1 · Q30A cubic block of mass m is sliding down on an inclined plane at 60∘60^\circ with an acceleration of g2\frac{g}{2}, the value of coefficient…EasySingle correct
  6. 4 Apr 2024, Shift 1 · Q33A wooden block, initially at rest on the ground, is pushed by a force which increases linearly with time t. Which of the following curve…MediumDiagram basedHas a figure

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.