In mechanical systems, which of the following is NOT a type of friction?

The correct answer is inertial friction because it is not commonly classified as a type of friction in mechanical systems. Friction typically refers to the resistance that one surface or object encounters when moving over another, and there are specific types of friction that are widely recognized in this context.

Rolling friction occurs when an object rolls over a surface, such as a wheel on a road, and is generally less than static or kinetic friction due to the limited area of contact. Air friction, often referred to as drag or fluid resistance, is the force acting opposite to the relative motion of an object as it moves through the air. Kinetic friction describes the resistance encountered by two surfaces in relative motion.

Inertial friction is not a standard term used in mechanical systems to describe the context of resistive forces, making it distinct from the recognized types of friction. Understanding the specific types of friction helps in designing mechanical systems by allowing engineers to predict how components will interact when in motion.