Question

aa child and stone and football have same mass which has the largest inertia ​

Answer 1

Answer:

According to me, as their masses are equal, therefore their inertia is also equal, because inertia of an object depends upon the mass of that object.

Answer 2

Answer:

All of them will have same inertia since

Inertia is directly proportional to mass

and all the things you mentioned are of equal masses