Strength of Materials
A number of forces acting at a point will be in equilibrium if

Sum of resolved parts in any two perpendicular directions are both zero
All of them are inclined equally
Two resolved parts in two directions at right angles are equal
Their total sum is zero

ANSWER DOWNLOAD EXAMIANS APP

Strength of Materials
Kinetic friction is the

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

ANSWER DOWNLOAD EXAMIANS APP