Solids that are actually glued, or better yet soldered, together.
Rough surfaces typically produce the greatest amount of friction because there are more contact points between the surfaces, leading to increased resistance to motion.Smooth surfaces, on the other hand, tend to have less friction due to reduced contact points and smoother interactions between surfaces.
I would expect a rough surface to have the greatest amount of friction due to the increased contact points between the surfaces, resulting in a higher resistance to motion. Smooth surfaces typically have less friction due to reduced contact points.
The factors that determine the amount of friction between two surfaces include the roughness of the surfaces, the force pressing the surfaces together, and the types of materials involved. Friction increases with rougher surfaces, higher forces, and when the materials have a high coefficient of friction.
The amount of friction is generally greater between rough surfaces because the irregularities on the surfaces create more points of contact and interlock, increasing resistance to motion. Smooth surfaces have less interlocking and contact points, resulting in lower friction.
Friction= Normal force* Coefficient of friction
Rough because it takes longer to slide and gets more friction
Force pushing two surfaces together
The amount of friction between two surfaces depends on the type of surface and the normal force pressing the surfaces together. The normal force is the force that acts perpendicular to the surfaces in contact.
The amount of friction between two objects is affected by the type of surfaces in contact (smooth or rough) and the force pressing the surfaces together (normal force). Rough surfaces and increased normal force typically result in higher friction.
The coefficient of friction between two surfaces is highest when the surfaces are rough and have a large amount of resistance to sliding past each other. Smooth surfaces or surfaces with lubricants have lower coefficients of friction.
The amount of sliding friction usually depends on several factors, including the nature of the surfaces in contact, the normal force pressing the surfaces together, and the presence of any lubricants or contaminants between the surfaces. Additionally, the roughness and temperature of the surfaces can also affect the amount of sliding friction.
The kinetic friction coefficient is a measure of the resistance between two surfaces in motion. A higher coefficient means more force is needed to overcome the friction and keep the surfaces moving.