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Physics · Friction

JEE Main 2026 — 4 April, Morning Shift — Question 3

The 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 compared to the time taken by the same block on identical inclined smooth plane. Both inclined planes are at 45° with the horizontal. The coefficient of kinetic friction between the rough inclined surface and block is

  1. Option A:

    34\frac{3}{4}

  2. Option B:

    23\frac{2}{3}

  3. Option C:

    59\frac{5}{9}

  4. Option D:

    49\frac{4}{9}

    Correct

Answer: D

Step-by-step solution

For rough: a = g(sinθ-μcosθ), t₁ = √(2ℓ/a)

Solution figure

Answer key and solution verified before publishing.

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Exam
JEE Main 2026
Paper
4 April, Morning Shift
Subject
Physics
Chapter
Friction
Topic
Single Block Problems Involving Friction
The time taken by a block of mass m to slide down from the highest… | JEE Main 2026 PYQ with Solution · DhiX AI