Chapter 9, Problem 4MCP

Two uniform solid spheres of the same size, but different mass, are released from rest simultaneously at the same height on a hill and roll to the bottom without slipping. Which of the following statements about these spheres are true? (There may be more than one correct choice.)

1. A.    Both spheres reach the bottom at the same time.
2. B.     The heavier sphere reaches the bottom ahead of the lighter one.
3. C.     Both spheres arrive at the bottom with the same forward speed.
4. D.    Both spheres arrive at the bottom with the same total kinetic energy.