Question

define 1.angle of response and 2.angle of friction.

Answer 1

Hey guys this is your answer
1)The steepest angle at which a sloping surface formed of loose material is stable.
2)This is the angle of a plane to the horizontal when a body placed on the plane will just start to slide. The tangent of the angle of friction is the coefficient of static friction. For example the angle between the sliding road is called angle of friction....

Answer 2

Angle of repose: the angle that the plane of contact between two bodies makes with the horizontal when the upper body is just on the point of sliding : the angle whose tangent is the coefficient of friction between the two bodies.
Angle of internal friction. ... It is the angle (φ), measured between the normal force (N) and resultant force (R), that is attained when failure just occurs in response to a shearing stress (S). Its tangent (S/N) is the coefficient of sliding friction. Its value is determined experimentally.