Question

The bigger mass, the bigger the inertia is. How can I prove this using a formula?

Answer 1

we use momentum, not inertia, but if they are the same thing, then P=MV, so mass and momentum are linearally related,

Answer 2

if we consider a continous body then the formula for moment of inertia is I = m\[m _{i} r _{i}^{2}\] this shows a direct relatopnship between moment of inertia and mass

Answer 3

\[where ,r _{i} \] is the distance between a small element of that body from the center of mass