Question

fill in the blank dash assist human beings typically by performing a job that is dirty dull distant dangerous or repetitive​

Answer 1

Answer:

DEMOCRACY

Friction is a resistive force, which comes into play when there is a relative motion between two bodies in contact. The frictional force between two bodies depends mainly on three factors:

(I) the adhesion between body surfaces (ii) roughness of the surface

(iii) deformation of bodies.