試題詳解

44. Four objects are released from rest at the top of an inclined plane and roll down the plane (see the figure). A is a solid sphere. B is a hollow sphere, C is a solid cylinder, and D is a hollow cylinder. All of the four objects have identical radii and masses. Assume that the objects roll without slipping. Which one would win the race?

(A) A
(B) B
(C) C
(D) D
(E) AIl arrive at the end of the inclined plane at the same time.