Question

What is the relation between frictional force and roughness of Area ?​

Answer 1

Answer:

The roughness tests showed that at a low surface roughness the finger dominates the interaction, so little difference is seen between materials and roughness. However, as the roughness increases the friction increases linearly, up to a point.

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Answer 2

The connection between frictional force and the roughness of the area is indirect.

Explanation:

• It is dependent on the environment (lubrication, humidity, temperature), the materials of the two surfaces, and the type of motion (sliding, rolling, static). These factors could cause alterations in the main mechanism that accommodates relative motion and force exchange between the two sides while also causing friction and wear.
• Furthermore, when all other factors are equal, friction does not follow a linear relationship with surface roughness. For various reasons, highly rough or very smooth surfaces yield higher friction coefficients (plasticity for rough ones, adhesion for smooth ones).
• As a result, depending on where you are, you may obtain contradictory results or live in a location where friction is unaffected by surface roughness.