Inertia can be categorized as:

Inertia is a fundamental concept in physics that refers to the resistance of any physical object to a change in its state of motion or rest. This concept can be categorized in various ways based on the state of the object.

Resting inertia refers to an object at rest that resists any attempt to move it. This can be illustrated by an object that remains stationary until a force is applied. It highlights the tendency of objects to remain in their current state unless acted upon by an external force.

Moving inertia, on the other hand, pertains to objects already in motion. These objects resist changes to their velocity, meaning they will continue to move at a constant speed in a straight line unless acted upon by an external force.

This understanding of inertia encompasses both resting and moving states, making it clear that both play significant roles in how objects interact with forces. Thus, acknowledging both forms leads to a comprehensive understanding of inertia, validating the response that includes both resting and moving inertia as correct categorizations.