Surface area frictional force is the force that resists the motion of an object as it slides or rolls over a surface. It occurs due to the microscopic irregularities and interactions between two surfaces in contact with each other.
Surface area frictional force is calculated by multiplying the coefficient of friction (a measure of how easily two surfaces slide against each other) by the normal force (the force that presses the two surfaces together).
The factors that affect surface area frictional force include the roughness and hardness of the surfaces in contact, the normal force, and the type of material the surfaces are made of.
Some real-life examples of surface area frictional force include the friction between car tires and the road, the friction between the soles of shoes and the ground, and the friction between a pencil and a piece of paper as it writes.
Surface area frictional force can be reduced by using lubricants, such as oil or grease, between the two surfaces to reduce the coefficient of friction. Additionally, polishing or smoothing out the surfaces can also reduce friction.