Question

A ring, cylinder, solid sphere, and hollow sphere are all released from rest from the same height on an inclined surface, at the same time. All four objects have uniform density, have the same mass, and roll without slipping.

1. Which one reaches the bottom first? a) ring b) cylinder c) solid sphere d) hollow sphere e) they all reach the bottom at the same time

2. Which one has the largest total kinetic energy at the bottom? a) ring b) cylinder c) solid sphere d) hollow sphere e) they all reach the bottom with the same total kinetic energy

Please provide detail explanation for the solution.

Answer 1