One phase of liquid helium has such a low coefficient of friction that it will flow out of a container, up the walls of that container and drip off the bottom. Other materials such as smooth Teflon can have frictions equal to wet ice on wet ice.
Silver... but however its has a relatively high density so copper and gold are the materials used... the answer is COPPER
Materials such as glass, alunium foil, and any lubricant
Graphite, PTFE, and ice have a low coefficient of friction.
those with a rougher surface.
kinetic friction
wet surfaces like tiles have the least amount oof friction
Plane surface with negligible friction.
With what material? Coefficient of friction is for two materials.
The larger the contact surface, the more friction. The more uneven the surface, the more friction. The material of the surface has also an effect on friction.
Wood, or any other material, could be used to introduce static friction to a system. The choice of material(s) depends on how much static friction the system requires. Each material has its unique coefficient of friction.
i think it it rolling friction
kinetic friction
wet surfaces like tiles have the least amount oof friction
Plane surface with negligible friction.
With what material? Coefficient of friction is for two materials.
The larger the contact surface, the more friction. The more uneven the surface, the more friction. The material of the surface has also an effect on friction.
Any type of material has friction because everything has microscopic hills and valleys; some materials have more friction because the materials hills and valleys are larger than other materials.
Different materials have different coefficients of friction because the materials have different microscopic bumps and valleys which cause the friction to begin with. Coefficients of friction are constant for each material.
Graphite
Friction occurs when two material bodies in contact slide past one another.
The friction material in the braking system