Question

list
the
material required to verify
effect of roughness
frictional
force​

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. At this point the friction does not vary as the width and height of the surface ridges are increased.

Explanation: