Consider a rod rotating freely in a vertical plane. If two equal weights are attached to each side of the rod, a static equilibrium can be established when both the net force and the net torque are balanced in the system. In a free body diagram, the gravitational force on each weight acts downward, while a normal force equal to the sum of the weights attached acts upward at the pivot point, thus balancing the forces in the system. If the weights are at an equal distance from the axis of rotation, the torques acting at these points are equal in magnitude but act in the opposite direction, making the net torque zero. Thus, a static equilibrium is established. If one weight is moved closer to the axis of rotation, the torque due to this weight reduces. As a result, there is a net torque that rotates the rod. Although the net force is balanced in the system, it is not in static equilibrium as the second condition is violated.