* Inertia is directly proportional to mass: Inertia is the tendency of an object to resist changes in its motion. The more massive an object is, the harder it is to start it moving, stop it, or change its direction.
* Trains are much more massive than cars: A typical train can weigh hundreds of tons, while a car might weigh around a ton or two. This huge difference in mass means the train has significantly more inertia.
Think of it like this:
Imagine pushing a small toy car and then pushing a large refrigerator. The refrigerator is much harder to move because it has more inertia. The same principle applies to a train and a car.
Even though both the train and the car have the same velocity, the train will take much more force to stop or change direction because of its larger mass and therefore greater inertia.
