When brake pads press against brake rotors, different types of friction forces are at work to make your vehicle come to a safe, complete stop. All brake pads use 2 different types of friction to stop vehicles: Abrasive friction and Adherent friction. Abrasive Friction is pretty simple, it works similar to sandpaper. The brake pads press against the rotors and cause friction to help slow the vehicle. Adherent Friction is more complex. When fresh pads are installed and the burnish or break-in proc