What is Equilibrium of Forces?

Equilibrium of Forces Forces that have zero linear resultant and zero turning effect will not cause any change in the motion of the object to which they are applied. Such forces (and the object) are said to be in equilibrium. Mathematically a body is said to be in equilibrium if (a) Net force acting on it is zero, i.e., $\vec{F}_{\text {net }}=0$ (b) Net moments of all the forces acting on it about any axis is zero. Physically the body at rest is said to be in equilibrium if it is permanently at...