Question

can the coefficient of friction can be more than one

Answer 1

A value of 1 means the frictional force is equal to the normal force. Some people think that the coefficient of friction can never be more than 1, but this is not true. A coefficient of friction that is more than one just means that friction is stronger than the normal force. An object such as silicone rubber, for example, can have a coefficient of friction much greater than one.

Answer 2

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⭐. Yes . In general coefficient of friction is less than one.

⭐. If the surfaces are polished heavily then adhesive forces between the molecules increases and then coefficient of friction will be greater than one .