Objects with the same mass will always have the same amount of inertia.

Inertia is the tendency of an object to resist changes in its motion. It is directly proportional to the object's mass.

Here's why:

* Mass is a fundamental property of matter that measures its resistance to acceleration. The more massive an object is, the harder it is to get it moving or to stop it once it's in motion.

* Inertia is a consequence of mass. It's the manifestation of this resistance to change in motion.

Therefore, if two objects have the same mass, they will inherently have the same inertia, regardless of any other factors.

Let me know if you have any other questions about inertia or mass!