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Question 30228
JEE Physics · Medium

Laws of Motion and Friction: Limiting Friction MCQ

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Limiting FrictionMediumQuestion 30228

Question

The force just sufficient to start a block moving from rest is equal to:
  1. A
    Kinetic friction
  2. B
    Limiting (maximum) static friction
    Correct
  3. C
    Normal force
  4. D
    Applied force divided by mass

Correct answer

Limiting (maximum) static friction

Explanation

The block starts moving when applied force reaches the limiting static friction = μₛN. Once moving, kinetic friction (μₖN, usually less) maintains motion.

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