Among a car and a ship which object has more inertia and why?
The ship, because it is more massive
Quantitatively, the inertia of an object is measured by its mass. Inertia is the natural tendency of an object to resist a change in its state of motion or of rest. Inertia and mass are interrelated. Heavier or massive objects offer larger inertia. The mass of an object is a measure of its inertia.
Since the ship is much heavier than the car, the ship offers more inertia.