A hollow sphere, a solid sphere, a disc and a ring all having same mass and radius are rolled down on an inclined plane. If no slipping takes place, which one will

Question

Philoid · Accepted Answer

Moment of inertia is the rotational analogous of mass.

Now,

So, the one with least moment of inertia will attain a higher speed. Hence, the solid sphere will take the smallest time.

A hollow sphere, a solid sphere, a disc and a ring all having same mass and radius are rolled down on an inclined plane. If no slipping takes place, which one willtake the smallest time to cover a given length?

A hollow sphere, a solid sphere, a disc and a ring all having same mass and radius are rolled down on an inclined plane. If no slipping takes place, which one will
take the smallest time to cover a given length?