Question

the moment of inertia of a thin

Answer 1

A point mass does not have amoment of inertia around its own axis, but using the parallel axis theorem a moment of inertia around a distant axis of rotation is achieved. ... Rod of length L and mass m, rotating about one end. This expression assumes that the rod is an infinitelythin (but rigid) wire.

Answer 2

moment of inertia of thin rod=ml^2/12