Strength of Materials
The necessary condition for forces to be in equilibrium is that these should be

Coplanar
All be equal
Meet at one point
Coplanar & Meet at one point

ANSWER DOWNLOAD EXAMIANS APP

Strength of Materials
Coefficient of friction is the

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

ANSWER DOWNLOAD EXAMIANS APP