The teacher said that the inertia of an object is only related to its mass, not other physical quantities! If two objects have the same mass, but different velocities, do they still have the same iner

The teacher said that the inertia of an object is only related to its mass, not other physical quantities! If two objects have the same mass, but different velocities, do they still have the same inertia? Inertia is the property that an object keeps its original state of motion unchanged.

Inertia is only related to the mass of the object and has nothing to do with other factors.

Example: shot put (5 kg) ball (half a catty)

When they are raised from the static state to the speed v = 10m/s, the balls will be much easier, indicating that objects with small mass are easy to change their motion state and have small inertia. The magnitude of inertia indicates the difficulty of changing the state of motion.

If two objects have the same mass but different velocities, their inertia is the same. The magnitude of inertia indicates the difficulty of changing the state of motion. For example, two objects with the same mass, one accelerates from rest and the other decelerates from 10 m/s, the first object should try to stay still and the second object should try to keep its original speed. The first time you change it to 1m/s, and the second time you change it to 1m/s, the difficulty is actually the same, but the speed of the second time is still 9m/s, which seems to be much faster than the first time. But in fact, only the amount of change between them is the same.

It only represents one attribute, and that is the difficulty of change. Has nothing to do with the state of motion.