JEE Main 2026 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 2 April 2026, Shift 2, Physics Q27

Question 27 of 75 in this shift, Physics question 2 of 25, Section A.

A 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 rotational speed of the drum to enable the mass to remain stuck to the wall (without falling) is 5 rad/s. The coefficient of friction between the drum's inner wall surface and mass is (Take

g = 10

m/s

^2

)

(1) $0.1$ Official answer
(2) $0.5$
(3) $0.7$
(4) $0.3$

Official answer

Option 1

NTA final key.

Chapter: Laws of Motion
Topic: Friction
Idea tested: Rotor / Death Well Friction

Same topic in other shifts

All Friction questions

4 Apr 2026, Shift 1 · Q28The time taken by a block of mass $m$ to slide down from the highest point to the lowest point on a rough inclined plane is $50\ \%$ more…MediumSingle correct
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4 Apr 2025, Shift 2 · Q44A block of mass 25 kg is pulled along a horizontal surface by a force at an angle $45^\circ$ with the horizontal. The friction coefficient…MediumSingle correct
7 Apr 2025, Shift 1 · Q30A cubic block of mass m is sliding down on an inclined plane at $60^\circ$ with an acceleration of $\frac{g}{2}$ , the value of coefficient…EasySingle correct
6 Apr 2024, Shift 2 · Q31A car of 800 kg is taking turn on a banked road of radius 300 m and angle of banking $30^\circ$ . If coefficient of static friction is 0.2…MediumSingle correct
30 Jan 2024, Shift 2 · Q34A block of mass $m$ is placed on a surface having vertical crossection given by $y = x^2 / 4$ . If coefficient of friction is 0.5, the…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 42 of the 174 JEE Main shifts held from 2017 to 2026.