Introduction:

When an object experiences a net zero unbalanced force, it means that the total force acting on the object is balanced and cancels out, resulting in no acceleration. In such a scenario, the object can either be at rest or moving with a constant velocity.

Explanation:

1. Balanced forces:
When the forces acting on an object are balanced, the object remains at rest or continues to move with a constant velocity. This is in accordance with Newton's first law of motion, also known as the law of inertia. According to this law, an object will maintain its state of motion unless acted upon by an unbalanced force.

2. Net zero unbalanced force:
The term "net zero unbalanced force" implies that the sum of all the forces acting on an object is zero, resulting in a balanced force situation. This can occur in different scenarios:

- Stationary object: If an object is initially at rest and experiences equal and opposite forces, the net force acting on it will be zero. Consequently, the object will remain at rest.

- Object in motion: Similarly, if an object is already in motion and the forces acting on it balance each other out, the net force will be zero. This will cause the object to continue moving at a constant velocity, without any change in speed or direction.

Example:

Consider a book resting on a table. The force of gravity pulls the book downward, while the normal force exerted by the table pushes the book upward. These two forces are equal in magnitude and opposite in direction, resulting in a net zero unbalanced force. As a result, the book remains at rest on the table.

Conclusion:

In summary, when an object experiences a net zero unbalanced force, it can be either at rest or moving with a constant velocity. The balanced forces acting on the object cancel out, resulting in no acceleration or change in motion. This is in accordance with Newton's first law of motion.