What is inertia and how does an object mass influence it inertia? Provide one real world example

An object's mass directly influences its inertia: the greater an object's mass, the greater its inertia, meaning it will be harder to start moving if it's at rest, and harder to stop or change direction if it's already in motion.

Real-world example: It takes significantly more force to push a large, heavy truck from a standstill than it does to push a small car, because the truck has much greater mass and therefore much greater inertia.