Final answer:
The difference between static and dynamic equilibrium relates to an object's motion and the balance of forces. Static equilibrium is when an object is at rest with no net motion, while dynamic equilibrium involves constant velocity motion without acceleration, with both relying on balanced forces.
Step-by-step explanation:
The concept being asked about concerns equilibrium in physics, which is a state where the forces acting on an object are balanced. The differentiation between dynamic and static equilibrium is as follows: Static equilibrium refers to situations where an object is at rest and not moving, where all forces are balanced and there is no net motion. On the other hand, dynamic equilibrium is a condition where an object is moving with a constant velocity (meaning it is not accelerating), and even though it is in motion, the forces acting on it are still balanced. The primary focus of this differentiation is A) Forces acting on an object. This is evident because both types of equilibrium concern how external forces are balanced, either resulting in no motion or motion with constant velocity, but not acceleration.