A circular disc is to be made by using iron and aluminium so that it acquired maximum moment of inertia about geometrical axis. It is possible with

For the adjoining diagram, the correct relation between I₁, I₂, and I₃ is, (I-moment of inertia)

For a hollow cylinder and a solid cylinder rolling without slipping on an inclined plane, then which of these reaches earlier

As shown in the figure at point O a mass is performing vertical circular motion. The average velocity of the particle is increased, then at which point will the string break