Coefficient of friction between two surfaces in contact is always less than_____.

Why the coefficient of friction between two surfaces in contact varies directly with the normal reaction ?

A body weighing 10 kg rests on a horizontal surface, the co-efficient of static friction between the surfaces being 0.364. Find the horizontal force needed just to pull the block

A block placed on a horizontal surface is being pushed by a force F making an angle theta with the vertical. The coefficient of friction between the block and surface is mu The force required to slide down the block with uniform velocity on the floor is

The coefficient of friction between a body and the surface of inclined plane at 45^@ is 0.5. If g=9.8m/s^2 The acceleration of the body downwards in m/s^2 is

The frictional force between two. surfaces is independent of

Ratio of C_P to C_V is always greater than_____

Is friction independent of actual area of contact ?

A chain lies on a rough horizontal table. It starts skidding when one fourth of it’s length hangs over the edge of the table. The coefficient of static friction between the chain and the surface of the table is