Engineering Mechanics
Varingon's theorem of moments states that if a number of coplanar forces acting on a particle are in equilibrium, then

Their lines of action are at equal distances
The algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point
The algebraic sum of their moments about any point in their plane is zero
Their algebraic sum is zero

ANSWER DOWNLOAD EXAMIANS APP

Engineering Mechanics
Coplanar concurrent forces are those forces which

Do not meet at one point, but their lines of action lie on the same plane
Meet at one point and their lines of action also lie on the same plane
Meet at one point, but their lines of action do not lie on the same plane
Do not meet at one point and their lines of action do not lie on the same plane

ANSWER DOWNLOAD EXAMIANS APP