Question

A hollow sphere and a solid sphere having same mass and same radii are rolled down a rough inclined plane.A).The hollow sphere reaches the bottom first.B)The solid sphere reaches the bottom with greater speed.C)The solid sphere reaches the bottom with greater kinetic energy.D)The two spheres will reach the bottom with same linear momentum.

Answer 1

(B) the solid sphere must have a smaller moment of inertia

Both lose the same amount of potential energy and have the same energy (kinetic) at the bottom

The hollow moving sphere will be moving more slowly because it has more kinetic energy in the form of rotational energy