alleryFor a given pair of surfaces, the coefficient of kinetic friction is usually:
Aless than the coefficient of static friction
Bgreater than the coefficient of static friction
Cexactly zero
Dequal to the coefficient of static friction
Answer & Solution
Correct answer: A. less than the coefficient of static friction
Once relative motion starts, friction falls below its static maximum, so μk < μs for the same surfaces.
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