First the normal force or the force perpendicular to the ground and then the coefficient of friction which has different values based on "type of surface", "wet/dry/lubricated", "object in motion or at rest", etc.
how hard the surfaces push to gether the types of surfaces involved
Frictional force is the force that opposes motion between two surfaces.
we can reduce it by providing lubrication means using oil between 2 surfaces as lubricant.
an increase in uk (apex)
1. The Coefficient of friction between the two surfaces. 2. The force applied bringing the two surfaces together.
how hard the surfaces push to gether the types of surfaces involved
Frictional force is the force that opposes motion between two surfaces.
The magnitude of the frictional force is directly proprotional to the normal reaction between the two surfaces.(2)Magnitude of the frictional force is independent of shape and area of the surfaces
we can reduce it by providing lubrication means using oil between 2 surfaces as lubricant.
velocity and texture
Frictional force is the force that opposes motion between two surfaces.
an increase in uk (apex)
Yes the application of a load normal to the plane of the smooth flat surfaces will increase the friction between the surfaces.
1. The Coefficient of friction between the two surfaces. 2. The force applied bringing the two surfaces together.
maybe it could be something related to the universe
1 . By polishing the surfaces in contact 2 . By lubricating the surfaces in contact with oil or grease .
As they come into contact so tight friction would increase As roughness increases frictional force too increases.