What distinguishes static equilibrium from dynamic equilibrium?

Static equilibrium is characterized by the condition of an object that is at rest and experiencing no net forces acting on it. In this state, all the forces and moments acting upon the object are balanced, resulting in no acceleration or movement. An object in static equilibrium will not change its position because the forces acting on it are equal in magnitude and opposite in direction, leading to a stable situation without motion.

On the other hand, dynamic equilibrium refers to a state where an object is moving, but it maintains a constant velocity. This means that while the object is in motion, the forces acting on it balance out perfectly, preventing any change in its speed or direction.

The distinction lies primarily in the state of motion: static equilibrium describes an object at rest, whereas dynamic equilibrium pertains to an object in motion that remains consistent in its velocity. Thus, stating that static equilibrium involves an object that is at rest captures the essence of the term accurately.