If more than one force acts on a particle,state the condition for the equilibrium of the particle.

(N/A) For a particle to be in equilibrium under the action of multiple forces,the vector sum of all the forces acting on it must be zero.
Mathematically,this is expressed as $\Sigma \vec{F} = 0$.
Since force is a vector quantity,this condition implies that the sum of the components of the forces along each coordinate axis must be zero:
$\Sigma F_{x} = 0$,$\Sigma F_{y} = 0$,and $\Sigma F_{z} = 0$.