Is perpendicular axis theorem (inertia) applicable to a particle?
If no, Why not?
If yes, then in the question A uniform circular disc has diameter AB, mass 2m and radius a. A particle of mass m is attached to the disc at B. The disc is able to rotate about a smooth fixed horizontal axis through A. The axis tangential to the disc. Show that the moment of inertia of the system about the axis is 13/2 ma^2.
Why is perpendicular axis theorem not used on the particle?