A solid sphere, a hollow sphere and a disc, all having same mass and radius, are placed at the top of an incline and released. The friction coefficients between the objects and the incline are same and not sufficient allow pure rolling. Least time will be taken in reaching the bottom by
As there is not any pure rolling motion, the term moment of inertia has nothing to do with the motion of the object. They all are going to acts as objects with same speed.

Question

A solid sphere, a hollow sphere and a disc, all having same mass and radius, are placed at the top of an incline and released. The friction coefficients between the objects and the incline are same and not sufficient allow pure rolling. Least time will be taken in reaching the bottom by

As there is not any pure rolling motion, the term moment of inertia has nothing to do with the motion of the object. They all are going to acts as objects with same speed.

Philoid · Accepted Answer

As there is not any pure rolling motion, the term moment of inertia has nothing to do with the motion of the object. They all are going to acts as objects with same speed.