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As per your syllabus, KINETIC (sliding) friction is approximately given by which relation?
Af_k = μ_k N
Bf_k = 0 always
Cf_k = μ_s mg
Df_k ≥ μ_s N
Answer & Solution
Correct answer: A. f_k = μ_k N
Your syllabus: f_k = μ_k N. Independent of contact area, nearly independent of velocity. Lower than max static.
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