You're very close! The statement you provided is actually a definition of friction itself, not a way to represent its degree.

Here's a corrected version:

Friction is used to represent the degree to which two surfaces will resist sliding against one another.

Here's why the original statement was slightly off:

* Friction is the force that opposes motion between two surfaces in contact.

* The degree of friction is a measure of how much resistance there is to sliding. This degree is often represented by the coefficient of friction, which is a dimensionless number.

Let me know if you'd like to know more about the coefficient of friction or other aspects of friction!