Question

Moment of inertia of a uniform circular disc about a diameter is i. find its moment of inertia about a tangent perpendicular to its plane.

Answer 1

ans is 6xi


MI about diameter =mr^2/4=i
4xi= mr^2
MI ABOUT tangent passing perpendicular to it's plan =3mr^2/2=3x4i/2=12i/2=6i

Answer 2

I=14MR2⇒MR2=4I

we have find : I'=32MR2=324I=6I.