Applied Mechanics and Graphic Statics
A system of coplanar forces is in equilibrium when

All the forces are concurrent
Both force polygon" and funicular polygon close
Force polygon closes
Funicular polygon closes

ANSWER DOWNLOAD EXAMIANS APP

Applied Mechanics and Graphic Statics
Kinetic friction may be defined as

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

ANSWER DOWNLOAD EXAMIANS APP