What does Newton’s First Law of Motion state?

Newton's First Law of Motion, often referred to as the law of inertia, primarily states that an object at rest will remain at rest, and an object in motion will continue to move at a constant velocity, unless acted upon by a net external force. This law underscores the concept that if no net force acts on an object, its state of motion (whether at rest or moving) will not change.

Choosing the option that states an object at rest stays at rest unless acted upon by an external force captures part of this principle. The law emphasizes the idea that inertia keeps objects stationary or in uniform motion unless influenced by an unbalanced force, illustrating the foundational role of force in movement and the behavior of objects.

Other provided options touch on aspects related to motion but do not fully encapsulate the essence of Newton’s First Law. Thus, acknowledging that while all forces relate to motion, the core of the First Law is rooted in the concept of inertia, manifesting in both states of rest and uniform motion.