Newton's Three Laws
external forces act on a body resulting in no change of motion then
the body is in equilibrium. Under Newton's Second Law if there is
no change in motion the acceleration is zero. Which also means the
sum of all the forces is zero. The First Condition of Equilibrium
and if we resolve the vectors into perpendicular
a mass is attached to a rope so that it hangs there is tension
on the rope. If there is only one rope the weight of the mass
is equal to the tension in the rope.
there is more than one rope supporting the mass then we can use
the idea of a force-multiplier. As the figure show the weight
is distributed among the ropes.
for some Static Equilibrium examples.