(i) and (iii)
(ii) and (iii)
(ii) and (iv)
(i) and (iv)

A
A/√2
A√2
A/2

Applied Mechanics and Graphic Statics If the given forces P₁, P₂, P₃ and P₄ are such that the force polygon does not close, then the system will

Both (A) and (C)
Be in equilibrium
Always reduce to a resultant force
Always reduce to a couple

Applied Mechanics and Graphic Statics According to Law of Triangle of Forces

If three forces acting on a, point can be represented in magnitude and direction, by the sides of a triangle taken in order, these will be in equilibrium
Three forces acting at a point, can be rep-resented by the sides of a triangle, each side being in proportion to the force
Three forces acting along the sides of a triangle are always in equilibrium
If the forces acting on a particle be represented in magnitude and direction by the two sides of a triangle taken in order, their resultant will be represented in magnitude and direction by the third

25 kg
40 kg
50 kg
30 kg

15 m/sec
25 m/sec
50 m/sec
40 m/sec