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Friday, 9 October

JEE Main 2026 · PhysicsMultiple choiceSingle correctMediumMulti-step

JEE Main 4 April 2026, Shift 1, Physics Q28

Question 28 of 75 in this shift, Physics question 3 of 25, Section A.

The 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 compared to the time taken by the same block on identical inclined smooth plane. Both inclined planes are at 45∘45^\circ with the horizontal. The coefficient of kinetic friction between the rough inclined surface and block is ______.
  1. (1)3/43/4
  2. (2)2/32/3
  3. (3)5/95/9Official answer
  4. (4)4/94/9

Official answer

Option 3

NTA final key.

Chapter
Laws of Motion
Topic
Friction
Idea tested
Motion Down a Rough Incline

Same idea in other shifts

Asked 2× in all
  1. 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

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.