Question

In friction, the relation between coefficient of kinetic friction $ {{\mu }_{k}} $ and coefficient of static friction $ {{\mu }_{s}} $ is

• A. $ {{\mu }_{k}}\ge {{\mu }_{s}} $
• B. $ {{\mu }_{k}}={{\mu }_{s}} $
• C. $ {{\mu }_{k}}\le {{\mu }_{s}} $
• D. None of these

Answer 1

Answer: (C)

The coefficient of kinetic friction can't more than coefficient of static friction. Therefore, $ {{\mu }_{k}}\le {{\mu }_{s}} $