Newtons First Law of Motion is sometimes called the Law of...Group of answer choicesAction-reactionConstant motionInertiaAcceleration

Newton's First Law of Motion is sometimes called the Law of Inertia. This law states that an object at rest will remain at rest, and an object in motion will continue in motion with the same speed and in the same direction unless acted upon by a net external force. The term "inertia" refers to the tendency of an object to resist changes in its state of motion.

This principle implies that it is the natural tendency of objects to maintain their current state of motion. For example, if a ball is rolled on a frictionless surface, it will continue rolling indefinitely without any force acting on it. In a practical sense, inertia highlights the importance of forces in motion; without an external force, whether it's friction, gravity, or another push or pull, an object will not accelerate or decelerate.

In summary, the correct choice is Inertia.