A block of mass rests on a rough horizontal table. The coefficient of friction is . Find the limiting friction. (Take .)

Answer and explanation

Correct answer: D.

  1. Step 1: The normal reaction is N.
  2. Step 2: Limiting friction N.
Answer
.
Why not the others: is what you get if you give the normal reaction. is what you get if you use in place of . is what you get if you divide by .

Practise more Applied Maths: Forces, Friction and Equilibrium.

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