2.pushing or pulling shopping-carts in markets, construction store like home depot.
3. pushing or pulling seats in fast-food, food court, and in school. part two: The amount of mass something has depends on matter:
something that fills up space.
part three: example one describes inertia by not moving, and acting upon an unbalanced force.
example two describes inertia also the same don't do anything to it, if pushing or pulling it its an unbalanced force.
example three describes inertia is the same as the first two examples, its harder to move though.

