1. At rest: The object is stationary and not moving. This is a state of equilibrium, where all forces acting on the object cancel each other out.
2. In uniform motion: The object is moving at a constant velocity, meaning it travels in a straight line at a constant speed. This is also a state of equilibrium, as the object's acceleration is zero, indicating no net force is acting on it.
Newton's First Law of Motion explains this concept. It states that an object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Example: A book lying on a table is at rest because the gravitational force pulling it down is balanced by the normal force from the table pushing it up. If the book is pushed across the table, it will move at a constant velocity until an unbalanced force (like friction) slows it down.