Research methods is a broad term. While methods of data collection and data analysis represent the core of research methods, you have to address a range of additional elements within the scope of your research.
Performance Friction Brakes. With thousands of races and hundreds of professional championships won every year, Performance Friction is the leader in brake technology. From their Direct Drive Rotors to their Carbon Metallic pads, teams in every major racing series seek out Performance Friction's know-how for their braking needs.
Part of the standard model of surface friction is the assumption that the frictional resistance force between two surfaces is proportional to the normal force pressing them together. A common exception occurs in snow where greater traction occurs by having wider tires with lower pressure.