An unbalanced force acting on an object can occur in the following situations:
- When a net external force is applied to an object in one direction only, causing it to accelerate.
- When the forces acting upon an object are not equal in size, direction, or both. This creates a resultant force that produces a net force in a particular direction.
- When the forces acting on an object are not canceled out, resulting in a net or unbalanced force.
In other words, an unbalanced force results when there is an unequal opposing force acting on an object.
