JEE Physics · Medium

Laws of Motion and Friction: Friction — Maximum MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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Friction — MaximumMediumQuestion 30218

Question

A block of mass 5 kg rests on a surface with μₛ = 0.4. The maximum static friction force is: (g = 10 m/s²)
  1. A
    2 N
  2. B
    5 N
  3. C
    10 N
  4. D
    20 N
    Correct

Correct answer

20 N

Explanation

Maximum static friction = μₛ × N = μₛ × mg = 0.4 × 5 × 10 = 20 N.