Question

If two circular discs of same weigh and thickness are made from metals of different densities, which disc will have the larger moment of inertia about is central axis?

Answer 1

As mass of both the discs are same & thickness is also same. So, their moment of inertia depends on the radius. . Disc with larger radius will have more moment of inertia as moment of inertia is a function of mass and radius of the disc.