Two spheres, A and B, have the same mass and radius. However, sphere B is made of a dense core and a less dense shell around it. How does the moment of inertia of sphere A about its center of mass compare to the moment of inertia of sphere B about its center of mass?
Ia. IA > I B
Ib. IA < I B
Ic. IA = I B
If the two spheres are rolled down an incline from the same height simultaneously,
IIa. sphere A reaches the bottom first.
IIb. sphere B reaches the bottom first.
IIc. spheres A and B reach the bottom simultaneously.
Choose the correct pair of statements.