Question

Please guys give the answer soon.​

Answer 1

Answer:

For a given two surface, sliding friction is slightly lesser than that of the static friction because it is easy to move the object which already in motion than the object which is at rest.

Answer 2

Answer:

A number of factors affect the frictional conditions at the interface between these two surfaces in relative motion. These factors are:

1) Surface Finish — The number, roughness and even the directional contact points of the asperities on the surfaces can dramatically affect the frictional coefficient.

2) Operational Load — Friction varies directly with load. A load exceeding the designed capacity will dramatically increase the frictional coefficient.

3) Relative Speed — Increasing the speed beyond that which is safely specified will dramatically increase friction.