Applied Mechanics and Graphic Statics
Kinetic friction may be defined as

Ratio of limiting friction and normal reaction
Friction force acting when the body is in motion
Angle between normal reaction and resultant of normal reaction and limiting friction
Friction force acting when the body is just about to move

ANSWER DOWNLOAD EXAMIANS APP

Applied Mechanics and Graphic Statics
The angle of friction is:

The force of friction at which the body is just about to move
The angle between the normal reaction and the resultant of normal reaction and limiting friction
The force of friction when the body is in motion
The ratio of the friction and the normal reaction

ANSWER DOWNLOAD EXAMIANS APP