The objects listed are placed at the top of a ramp and roll down to the bottom without slipping. Assuming that there is no air resistance, rank them in order from fastest average rolling speed to slowest. Bowling ball, hollow globe, penny, and wedding ring.

Answer 1

rank the objects in order of their moments of inertia
... from lowest to highest

the bowling ball is a solid sphere
... the globe is a hollow sphere
... the penny is a disc
... the ring is ... a ring