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JAMB Physics 2003 Question 6

Question 6

Friction

If an object just begins to slide on a surface inclined at 30° to the horizontal, the coefficient of friction is

  1. A.√3
  2. B.√3/2
  3. C.1/√2
  4. D.1/√3
Show the answer and explanation

Answer: D (1/√3)

Explanation

When sliding just begins, μ = tan θ = tan 30° = 1/√3.