Define inertia and explain its types

While not distinct "types" in the sense of different forces, inertia manifests in two primary ways:

• Inertia of Rest: This is the tendency of an object to remain stationary if it is currently at rest. For example, a book on a table will stay there unless pushed or pulled.
• Inertia of Motion: This is the tendency of an object to continue moving at a constant velocity (same speed and direction) if it is already in motion. For example, passengers in a moving car lurch forward when the car suddenly brakes.