is that equilibrium is the condition of a system in which competing influences are balanced, resulting in no net change while equilibrant is a force equal to, but opposite of, the resultant sum of vector forces; that force which balances other forces, thus bringing an object to equilibrium.

What is called equilibrant?

: a force that will balance one or more unbalanced forces.

What is the equilibrium force?

If the size and direction of the forces acting on an object are exactly balanced, then there is no net force acting on the object and the object is said to be in equilibrium. ... Because the net force is equal to zero, the forces in Example 1 are acting in equilibrium.