Can the coefficient of friction be greater than 1?

Yes, it is possible for a coefficient of friction to be greater than 1. One particular example is rubber on rubber, which, according to this, has a static coefficient of friction of 1.16. read more

It can be greater than 1. The thing you misunderstand here is that the coefficient of friction is the ratio of the NORMAL force (or in the simplest case, weight) to the frictional force. For example, say a box sitting on the ground is pushed at a constant speed, and that the coefficient of friction is 1. read more

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. read more

Though the coefficient of friction is generally less than one, some object/surface combinations can have higher coefficients of friction, such as rubber on rubber. A coefficient of friction greater than one implies that the friction force on the object is greater than the normal force. read more