  The double-cone ascending an inclined V-rail is a common exhibit used for
demonstrating concepts related to center-of-mass in introductory physics
courses. While the conceptual explanation is well-known--the widening of the
ramp allows the center of mass of the cone to drop, overbalancing the increase
in altitude due to the inclination of the ramp--there remains rich physical
content waiting to be extracted through deeper exploration. Such an
investigations seems to be absent from the literature. This article seeks to
remedy the omission.
