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Question

Imagine a situation in which the horizontal surface of block straight M subscript 0 is smooth and its vertical surface is rough with a coefficient of friction  Identify  mu the correct statement(s)

  1. If F = 0, the blocks cannot remain stationary
  2. for one unique value of F, the blocks M and m remain stationary with respect to straight M subscript 0
  3. the limiting friction between m and straight M subscript 0is independent of F
  4. there exist a value of F at which friction force is equal to zero

The correct answer is: If F = 0, the blocks cannot remain stationary

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