Question

6. Find the moment of inertia of a uniform disc of radius a about an axis perpendicular to its plane passing through a point on its circumference.

Answer 1

if your end is this fig:
moment of inertia about axis passing through center of disc (normal to it) is : \[I=(1/2)ma ^{2}\] now with parallel axis theorem yields:\[I=I _{c.m}+ma ^{2}\] so I is \[(3/2)ma ^{2}\]